fix code

hutool-swing/src/main/java/cn/hutool/swing/DesktopUtil.java

@@ -31,7 +31,7 @@ public class DesktopUtil {
 	 *
 	 * @param url URL地址
 	 */
-	public static void browse(String url) {
+	public static void browse(final String url) {
 		browse(URLUtil.toURI(url));
 	}
 
@@ -41,11 +41,11 @@ public class DesktopUtil {
 	 * @param uri URI地址
 	 * @since 4.6.3
 	 */
-	public static void browse(URI uri) {
+	public static void browse(final URI uri) {
 		final Desktop dsktop = getDsktop();
 		try {
 			dsktop.browse(uri);
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			throw new IORuntimeException(e);
 		}
 	}
@@ -55,11 +55,11 @@ public class DesktopUtil {
 	 *
 	 * @param file URL地址
 	 */
-	public static void open(File file) {
+	public static void open(final File file) {
 		final Desktop dsktop = getDsktop();
 		try {
 			dsktop.open(file);
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			throw new IORuntimeException(e);
 		}
 	}
@@ -69,11 +69,11 @@ public class DesktopUtil {
 	 *
 	 * @param file 文件
 	 */
-	public static void edit(File file) {
+	public static void edit(final File file) {
 		final Desktop dsktop = getDsktop();
 		try {
 			dsktop.edit(file);
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			throw new IORuntimeException(e);
 		}
 	}
@@ -83,11 +83,11 @@ public class DesktopUtil {
 	 *
 	 * @param file 文件
 	 */
-	public static void print(File file) {
+	public static void print(final File file) {
 		final Desktop dsktop = getDsktop();
 		try {
 			dsktop.print(file);
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			throw new IORuntimeException(e);
 		}
 	}
@@ -97,11 +97,11 @@ public class DesktopUtil {
 	 *
 	 * @param mailAddress 邮件地址
 	 */
-	public static void mail(String mailAddress) {
+	public static void mail(final String mailAddress) {
 		final Desktop dsktop = getDsktop();
 		try {
 			dsktop.mail(URLUtil.toURI(mailAddress));
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			throw new IORuntimeException(e);
 		}
 	}

hutool-swing/src/main/java/cn/hutool/swing/RobotUtil.java

@@ -26,7 +26,7 @@ public class RobotUtil {
 	static {
 		try {
 			ROBOT = new Robot();
-		} catch (AWTException e) {
+		} catch (final AWTException e) {
 			throw new UtilException(e);
 		}
 	}
@@ -48,7 +48,7 @@ public class RobotUtil {
 	 * @param delayMillis 等待毫秒数
 	 * @since 4.5.7
 	 */
-	public static void setDelay(int delayMillis) {
+	public static void setDelay(final int delayMillis) {
 		delay = delayMillis;
 	}
 
@@ -69,7 +69,7 @@ public class RobotUtil {
 	 * @param y 移动到的y坐标
 	 * @since 4.5.7
 	 */
-	public static void mouseMove(int x, int y) {
+	public static void mouseMove(final int x, final int y) {
 		ROBOT.mouseMove(x, y);
 	}
 
@@ -103,7 +103,7 @@ public class RobotUtil {
 	 * @param wheelAmt 滚动数，负数表示向前滚动，正数向后滚动
 	 * @since 4.5.7
 	 */
-	public static void mouseWheel(int wheelAmt) {
+	public static void mouseWheel(final int wheelAmt) {
 		ROBOT.mouseWheel(wheelAmt);
 		delay();
 	}
@@ -115,8 +115,8 @@ public class RobotUtil {
 	 * @param keyCodes 按键码列表，见{@link java.awt.event.KeyEvent}
 	 * @since 4.5.7
 	 */
-	public static void keyClick(int... keyCodes) {
-		for (int keyCode : keyCodes) {
+	public static void keyClick(final int... keyCodes) {
+		for (final int keyCode : keyCodes) {
 			ROBOT.keyPress(keyCode);
 			ROBOT.keyRelease(keyCode);
 		}
@@ -128,7 +128,7 @@ public class RobotUtil {
 	 *
 	 * @param str 字符串
 	 */
-	public static void keyPressString(String str) {
+	public static void keyPressString(final String str) {
 		ClipboardUtil.setStr(str);
 		keyPressWithCtrl(KeyEvent.VK_V);// 粘贴
 		delay();
@@ -139,7 +139,7 @@ public class RobotUtil {
 	 *
 	 * @param key 按键
 	 */
-	public static void keyPressWithShift(int key) {
+	public static void keyPressWithShift(final int key) {
 		ROBOT.keyPress(KeyEvent.VK_SHIFT);
 		ROBOT.keyPress(key);
 		ROBOT.keyRelease(key);
@@ -152,7 +152,7 @@ public class RobotUtil {
 	 *
 	 * @param key 按键
 	 */
-	public static void keyPressWithCtrl(int key) {
+	public static void keyPressWithCtrl(final int key) {
 		ROBOT.keyPress(KeyEvent.VK_CONTROL);
 		ROBOT.keyPress(key);
 		ROBOT.keyRelease(key);
@@ -165,7 +165,7 @@ public class RobotUtil {
 	 *
 	 * @param key 按键
 	 */
-	public static void keyPressWithAlt(int key) {
+	public static void keyPressWithAlt(final int key) {
 		ROBOT.keyPress(KeyEvent.VK_ALT);
 		ROBOT.keyPress(key);
 		ROBOT.keyRelease(key);
@@ -188,7 +188,7 @@ public class RobotUtil {
 	 * @param outFile 写出到的文件
 	 * @return 写出到的文件
 	 */
-	public static File captureScreen(File outFile) {
+	public static File captureScreen(final File outFile) {
 		ImgUtil.write(captureScreen(), outFile);
 		return outFile;
 	}
@@ -199,7 +199,7 @@ public class RobotUtil {
 	 * @param screenRect 截屏的矩形区域
 	 * @return 截屏的图片
 	 */
-	public static BufferedImage captureScreen(Rectangle screenRect) {
+	public static BufferedImage captureScreen(final Rectangle screenRect) {
 		return ROBOT.createScreenCapture(screenRect);
 	}
 
@@ -210,7 +210,7 @@ public class RobotUtil {
 	 * @param outFile 写出到的文件
 	 * @return 写出到的文件
 	 */
-	public static File captureScreen(Rectangle screenRect, File outFile) {
+	public static File captureScreen(final Rectangle screenRect, final File outFile) {
 		ImgUtil.write(captureScreen(screenRect), outFile);
 		return outFile;
 	}

hutool-swing/src/main/java/cn/hutool/swing/ScreenUtil.java

@@ -59,7 +59,7 @@ public class ScreenUtil {
 	 * @return 写出到的文件
 	 * @see RobotUtil#captureScreen(File)
 	 */
-	public static File captureScreen(File outFile) {
+	public static File captureScreen(final File outFile) {
 		return RobotUtil.captureScreen(outFile);
 	}
 
@@ -70,7 +70,7 @@ public class ScreenUtil {
 	 * @return 截屏的图片
 	 * @see RobotUtil#captureScreen(Rectangle)
 	 */
-	public static BufferedImage captureScreen(Rectangle screenRect) {
+	public static BufferedImage captureScreen(final Rectangle screenRect) {
 		return RobotUtil.captureScreen(screenRect);
 	}
 
@@ -82,7 +82,7 @@ public class ScreenUtil {
 	 * @return 写出到的文件
 	 * @see RobotUtil#captureScreen(Rectangle, File)
 	 */
-	public static File captureScreen(Rectangle screenRect, File outFile) {
+	public static File captureScreen(final Rectangle screenRect, final File outFile) {
 		return RobotUtil.captureScreen(screenRect, outFile);
 	}
 }

hutool-swing/src/main/java/cn/hutool/swing/captcha/AbstractCaptcha.java

@@ -74,7 +74,7 @@ public abstract class AbstractCaptcha implements ICaptcha {
 	 * @param codeCount      字符个数
 	 * @param interfereCount 验证码干扰元素个数
 	 */
-	public AbstractCaptcha(int width, int height, int codeCount, int interfereCount) {
+	public AbstractCaptcha(final int width, final int height, final int codeCount, final int interfereCount) {
 		this(width, height, new RandomGenerator(codeCount), interfereCount);
 	}
 
@@ -86,7 +86,7 @@ public abstract class AbstractCaptcha implements ICaptcha {
 	 * @param generator      验证码生成器
 	 * @param interfereCount 验证码干扰元素个数
 	 */
-	public AbstractCaptcha(int width, int height, CodeGenerator generator, int interfereCount) {
+	public AbstractCaptcha(final int width, final int height, final CodeGenerator generator, final int interfereCount) {
 		this.width = width;
 		this.height = height;
 		this.generator = generator;
@@ -130,7 +130,7 @@ public abstract class AbstractCaptcha implements ICaptcha {
 	}
 
 	@Override
-	public boolean verify(String userInputCode) {
+	public boolean verify(final String userInputCode) {
 		return this.generator.verify(getCode(), userInputCode);
 	}
 
@@ -140,7 +140,7 @@ public abstract class AbstractCaptcha implements ICaptcha {
 	 * @param path 文件路径
 	 * @throws IORuntimeException IO异常
 	 */
-	public void write(String path) throws IORuntimeException {
+	public void write(final String path) throws IORuntimeException {
 		this.write(FileUtil.touch(path));
 	}
 
@@ -150,16 +150,16 @@ public abstract class AbstractCaptcha implements ICaptcha {
 	 * @param file 文件
 	 * @throws IORuntimeException IO异常
 	 */
-	public void write(File file) throws IORuntimeException {
-		try (OutputStream out = FileUtil.getOutputStream(file)) {
+	public void write(final File file) throws IORuntimeException {
+		try (final OutputStream out = FileUtil.getOutputStream(file)) {
 			this.write(out);
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			throw new IORuntimeException(e);
 		}
 	}
 
 	@Override
-	public void write(OutputStream out) {
+	public void write(final OutputStream out) {
 		IoUtil.write(out, false, getImageBytes());
 	}
 
@@ -210,7 +210,7 @@ public abstract class AbstractCaptcha implements ICaptcha {
 	 *
 	 * @param font 字体
 	 */
-	public void setFont(Font font) {
+	public void setFont(final Font font) {
 		this.font = font;
 	}
 
@@ -228,7 +228,7 @@ public abstract class AbstractCaptcha implements ICaptcha {
 	 *
 	 * @param generator 验证码生成器
 	 */
-	public void setGenerator(CodeGenerator generator) {
+	public void setGenerator(final CodeGenerator generator) {
 		this.generator = generator;
 	}
 
@@ -238,7 +238,7 @@ public abstract class AbstractCaptcha implements ICaptcha {
 	 * @param background 背景色
 	 * @since 4.1.22
 	 */
-	public void setBackground(Color background) {
+	public void setBackground(final Color background) {
 		this.background = background;
 	}
 
@@ -248,7 +248,7 @@ public abstract class AbstractCaptcha implements ICaptcha {
 	 * @param textAlpha 文字透明度，取值0~1，1表示不透明
 	 * @since 4.5.17
 	 */
-	public void setTextAlpha(float textAlpha) {
+	public void setTextAlpha(final float textAlpha) {
 		this.textAlpha = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, textAlpha);
 	}
 

hutool-swing/src/main/java/cn/hutool/swing/captcha/CaptchaUtil.java

@@ -15,7 +15,7 @@ public class CaptchaUtil {
 	 * @param height 图片高
 	 * @return {@link LineCaptcha}
 	 */
-	public static LineCaptcha createLineCaptcha(int width, int height) {
+	public static LineCaptcha createLineCaptcha(final int width, final int height) {
 		return new LineCaptcha(width, height);
 	}
 
@@ -28,7 +28,7 @@ public class CaptchaUtil {
 	 * @param lineCount 干扰线条数
 	 * @return {@link LineCaptcha}
 	 */
-	public static LineCaptcha createLineCaptcha(int width, int height, int codeCount, int lineCount) {
+	public static LineCaptcha createLineCaptcha(final int width, final int height, final int codeCount, final int lineCount) {
 		return new LineCaptcha(width, height, codeCount, lineCount);
 	}
 
@@ -40,7 +40,7 @@ public class CaptchaUtil {
 	 * @return {@link CircleCaptcha}
 	 * @since 3.2.3
 	 */
-	public static CircleCaptcha createCircleCaptcha(int width, int height) {
+	public static CircleCaptcha createCircleCaptcha(final int width, final int height) {
 		return new CircleCaptcha(width, height);
 	}
 
@@ -54,7 +54,7 @@ public class CaptchaUtil {
 	 * @return {@link CircleCaptcha}
 	 * @since 3.2.3
 	 */
-	public static CircleCaptcha createCircleCaptcha(int width, int height, int codeCount, int circleCount) {
+	public static CircleCaptcha createCircleCaptcha(final int width, final int height, final int codeCount, final int circleCount) {
 		return new CircleCaptcha(width, height, codeCount, circleCount);
 	}
 
@@ -66,7 +66,7 @@ public class CaptchaUtil {
 	 * @return {@link ShearCaptcha}
 	 * @since 3.2.3
 	 */
-	public static ShearCaptcha createShearCaptcha(int width, int height) {
+	public static ShearCaptcha createShearCaptcha(final int width, final int height) {
 		return new ShearCaptcha(width, height);
 	}
 
@@ -80,7 +80,7 @@ public class CaptchaUtil {
 	 * @return {@link ShearCaptcha}
 	 * @since 3.3.0
 	 */
-	public static ShearCaptcha createShearCaptcha(int width, int height, int codeCount, int thickness) {
+	public static ShearCaptcha createShearCaptcha(final int width, final int height, final int codeCount, final int thickness) {
 		return new ShearCaptcha(width, height, codeCount, thickness);
 	}
 
@@ -91,7 +91,7 @@ public class CaptchaUtil {
 	 * @param height 高
 	 * @return {@link GifCaptcha}
 	 */
-	public static GifCaptcha createGifCaptcha(int width, int height) {
+	public static GifCaptcha createGifCaptcha(final int width, final int height) {
 		return new GifCaptcha(width, height);
 	}
 
@@ -103,7 +103,7 @@ public class CaptchaUtil {
 	 * @param codeCount 字符个数
 	 * @return {@link GifCaptcha}
 	 */
-	public static GifCaptcha createGifCaptcha(int width, int height, int codeCount) {
+	public static GifCaptcha createGifCaptcha(final int width, final int height, final int codeCount) {
 		return new GifCaptcha(width, height, codeCount);
 	}
 }

hutool-swing/src/main/java/cn/hutool/swing/captcha/CircleCaptcha.java

@@ -27,7 +27,7 @@ public class CircleCaptcha extends AbstractCaptcha {
 	 * @param width 图片宽
 	 * @param height 图片高
 	 */
-	public CircleCaptcha(int width, int height) {
+	public CircleCaptcha(final int width, final int height) {
 		this(width, height, 5);
 	}
 
@@ -38,7 +38,7 @@ public class CircleCaptcha extends AbstractCaptcha {
 	 * @param height 图片高
 	 * @param codeCount 字符个数
 	 */
-	public CircleCaptcha(int width, int height, int codeCount) {
+	public CircleCaptcha(final int width, final int height, final int codeCount) {
 		this(width, height, codeCount, 15);
 	}
 
@@ -50,12 +50,12 @@ public class CircleCaptcha extends AbstractCaptcha {
 	 * @param codeCount 字符个数
 	 * @param interfereCount 验证码干扰元素个数
 	 */
-	public CircleCaptcha(int width, int height, int codeCount, int interfereCount) {
+	public CircleCaptcha(final int width, final int height, final int codeCount, final int interfereCount) {
 		super(width, height, codeCount, interfereCount);
 	}
 
 	@Override
-	public Image createImage(String code) {
+	public Image createImage(final String code) {
 		final BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
 		final Graphics2D g = ImgUtil.createGraphics(image, ObjUtil.defaultIfNull(this.background, Color.WHITE));
 
@@ -75,7 +75,7 @@ public class CircleCaptcha extends AbstractCaptcha {
 	 * @param g {@link Graphics2D}画笔
 	 * @param code 验证码
 	 */
-	private void drawString(Graphics2D g, String code) {
+	private void drawString(final Graphics2D g, final String code) {
 		// 指定透明度
 		if (null != this.textAlpha) {
 			g.setComposite(this.textAlpha);
@@ -88,7 +88,7 @@ public class CircleCaptcha extends AbstractCaptcha {
 	 *
 	 * @param g {@link Graphics2D}
 	 */
-	private void drawInterfere(Graphics2D g) {
+	private void drawInterfere(final Graphics2D g) {
 		final ThreadLocalRandom random = RandomUtil.getRandom();
 
 		for (int i = 0; i < this.interfereCount; i++) {

hutool-swing/src/main/java/cn/hutool/swing/captcha/GifCaptcha.java

@@ -37,7 +37,7 @@ public class GifCaptcha extends AbstractCaptcha {
 	 * @param width  验证码宽度
 	 * @param height 验证码高度
 	 */
-	public GifCaptcha(int width, int height) {
+	public GifCaptcha(final int width, final int height) {
 		this(width, height, 5);
 	}
 
@@ -46,7 +46,7 @@ public class GifCaptcha extends AbstractCaptcha {
 	 * @param height    验证码高度
 	 * @param codeCount 验证码个数
 	 */
-	public GifCaptcha(int width, int height, int codeCount) {
+	public GifCaptcha(final int width, final int height, final int codeCount) {
 		super(width, height, codeCount, 10);
 	}
 
@@ -75,7 +75,7 @@ public class GifCaptcha extends AbstractCaptcha {
 	 * @param repeat 必须大于等于0
 	 * @return this
 	 */
-	public GifCaptcha setRepeat(int repeat) {
+	public GifCaptcha setRepeat(final int repeat) {
 		if (repeat >= 0) {
 			this.repeat = repeat;
 		}
@@ -88,7 +88,7 @@ public class GifCaptcha extends AbstractCaptcha {
 	 * @param maxColor 颜色
 	 * @return this
 	 */
-	public GifCaptcha setMaxColor(int maxColor) {
+	public GifCaptcha setMaxColor(final int maxColor) {
 		this.maxColor = maxColor;
 		return this;
 	}
@@ -99,7 +99,7 @@ public class GifCaptcha extends AbstractCaptcha {
 	 * @param minColor 颜色
 	 * @return this
 	 */
-	public GifCaptcha setMinColor(int minColor) {
+	public GifCaptcha setMinColor(final int minColor) {
 		this.minColor = minColor;
 		return this;
 	}
@@ -109,17 +109,17 @@ public class GifCaptcha extends AbstractCaptcha {
 		generateCode();
 		final ByteArrayOutputStream out = new ByteArrayOutputStream();
 
-		AnimatedGifEncoder gifEncoder = new AnimatedGifEncoder();// gif编码类
+		final AnimatedGifEncoder gifEncoder = new AnimatedGifEncoder();// gif编码类
 		//生成字符
 		gifEncoder.start(out);
 		gifEncoder.setQuality(quality);//设置量化器取样间隔
 		// 帧延迟 (默认100)
-		int delay = 100;
+		final int delay = 100;
 		gifEncoder.setDelay(delay);//设置帧延迟
 		gifEncoder.setRepeat(repeat);//帧循环次数
 		BufferedImage frame;
-		char[] chars = code.toCharArray();
-		Color[] fontColor = new Color[chars.length];
+		final char[] chars = code.toCharArray();
+		final Color[] fontColor = new Color[chars.length];
 		for (int i = 0; i < chars.length; i++) {
 			fontColor[i] = getRandomColor(minColor, maxColor);
 			frame = graphicsImage(chars, fontColor, chars, i);
@@ -131,7 +131,7 @@ public class GifCaptcha extends AbstractCaptcha {
 	}
 
 	@Override
-	protected Image createImage(String code) {
+	protected Image createImage(final String code) {
 		return null;
 	}
 
@@ -143,19 +143,19 @@ public class GifCaptcha extends AbstractCaptcha {
 	 * @param flag      透明度使用
 	 * @return BufferedImage
 	 */
-	private BufferedImage graphicsImage(char[] chars, Color[] fontColor, char[] words, int flag) {
-		BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
+	private BufferedImage graphicsImage(final char[] chars, final Color[] fontColor, final char[] words, final int flag) {
+		final BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
 		//或得图形上下文
-		Graphics2D g2d = image.createGraphics();
+		final Graphics2D g2d = image.createGraphics();
 		//利用指定颜色填充背景
 		g2d.setColor(ObjUtil.defaultIfNull(this.background, Color.WHITE));
 		g2d.fillRect(0, 0, width, height);
 		AlphaComposite ac;
 		// 字符的y坐标
-		float y = (height >> 1) + (font.getSize() >> 1);
-		float m = 1.0f * (width - (chars.length * font.getSize())) / chars.length;
+		final float y = (height >> 1) + (font.getSize() >> 1);
+		final float m = 1.0f * (width - (chars.length * font.getSize())) / chars.length;
 		//字符的x坐标
-		float x = Math.max(m / 2.0f, 2);
+		final float x = Math.max(m / 2.0f, 2);
 		g2d.setFont(font);
 		// 指定透明度
 		if (null != this.textAlpha) {
@@ -181,10 +181,10 @@ public class GifCaptcha extends AbstractCaptcha {
 	 *
 	 * @return float 透明度
 	 */
-	private float getAlpha(int v, int i, int j) {
-		int num = i + j;
-		float r = (float) 1 / v;
-		float s = (v + 1) * r;
+	private float getAlpha(final int v, final int i, final int j) {
+		final int num = i + j;
+		final float r = (float) 1 / v;
+		final float s = (v + 1) * r;
 		return num > v ? (num * r - s) : num * r;
 	}
 

hutool-swing/src/main/java/cn/hutool/swing/captcha/LineCaptcha.java

@@ -28,7 +28,7 @@ public class LineCaptcha extends AbstractCaptcha {
 	 * @param width 图片宽
 	 * @param height 图片高
 	 */
-	public LineCaptcha(int width, int height) {
+	public LineCaptcha(final int width, final int height) {
 		this(width, height, 5, 150);
 	}
 
@@ -40,13 +40,13 @@ public class LineCaptcha extends AbstractCaptcha {
 	 * @param codeCount 字符个数
 	 * @param lineCount 干扰线条数
 	 */
-	public LineCaptcha(int width, int height, int codeCount, int lineCount) {
+	public LineCaptcha(final int width, final int height, final int codeCount, final int lineCount) {
 		super(width, height, codeCount, lineCount);
 	}
 	// -------------------------------------------------------------------- Constructor end
 
 	@Override
-	public Image createImage(String code) {
+	public Image createImage(final String code) {
 		// 图像buffer
 		final BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
 		final Graphics2D g = GraphicsUtil.createGraphics(image, ObjUtil.defaultIfNull(this.background, Color.WHITE));
@@ -67,7 +67,7 @@ public class LineCaptcha extends AbstractCaptcha {
 	 * @param g {@link Graphics}画笔
 	 * @param code 验证码
 	 */
-	private void drawString(Graphics2D g, String code) {
+	private void drawString(final Graphics2D g, final String code) {
 		// 指定透明度
 		if (null != this.textAlpha) {
 			g.setComposite(this.textAlpha);
@@ -80,14 +80,14 @@ public class LineCaptcha extends AbstractCaptcha {
 	 *
 	 * @param g {@link Graphics2D}画笔
 	 */
-	private void drawInterfere(Graphics2D g) {
+	private void drawInterfere(final Graphics2D g) {
 		final ThreadLocalRandom random = RandomUtil.getRandom();
 		// 干扰线
 		for (int i = 0; i < this.interfereCount; i++) {
-			int xs = random.nextInt(width);
-			int ys = random.nextInt(height);
-			int xe = xs + random.nextInt(width / 8);
-			int ye = ys + random.nextInt(height / 8);
+			final int xs = random.nextInt(width);
+			final int ys = random.nextInt(height);
+			final int xe = xs + random.nextInt(width / 8);
+			final int ye = ys + random.nextInt(height / 8);
 			g.setColor(ImgUtil.randomColor(random));
 			g.drawLine(xs, ys, xe, ye);
 		}

hutool-swing/src/main/java/cn/hutool/swing/captcha/ShearCaptcha.java

@@ -27,7 +27,7 @@ public class ShearCaptcha extends AbstractCaptcha {
 	 * @param width 图片宽
 	 * @param height 图片高
 	 */
-	public ShearCaptcha(int width, int height) {
+	public ShearCaptcha(final int width, final int height) {
 		this(width, height, 5);
 	}
 
@@ -38,7 +38,7 @@ public class ShearCaptcha extends AbstractCaptcha {
 	 * @param height 图片高
 	 * @param codeCount 字符个数
 	 */
-	public ShearCaptcha(int width, int height, int codeCount) {
+	public ShearCaptcha(final int width, final int height, final int codeCount) {
 		this(width, height, codeCount, 4);
 	}
 
@@ -50,12 +50,12 @@ public class ShearCaptcha extends AbstractCaptcha {
 	 * @param codeCount 字符个数
 	 * @param thickness 干扰线宽度
 	 */
-	public ShearCaptcha(int width, int height, int codeCount, int thickness) {
+	public ShearCaptcha(final int width, final int height, final int codeCount, final int thickness) {
 		super(width, height, codeCount, thickness);
 	}
 
 	@Override
-	public Image createImage(String code) {
+	public Image createImage(final String code) {
 		final BufferedImage image = new BufferedImage(this.width, this.height, BufferedImage.TYPE_INT_RGB);
 		final Graphics2D g = GraphicsUtil.createGraphics(image, ObjUtil.defaultIfNull(this.background, Color.WHITE));
 
@@ -77,7 +77,7 @@ public class ShearCaptcha extends AbstractCaptcha {
 	 * @param g {@link Graphics}画笔
 	 * @param code 验证码
 	 */
-	private void drawString(Graphics2D g, String code) {
+	private void drawString(final Graphics2D g, final String code) {
 		// 指定透明度
 		if (null != this.textAlpha) {
 			g.setComposite(this.textAlpha);
@@ -93,7 +93,7 @@ public class ShearCaptcha extends AbstractCaptcha {
 	 * @param h1 h1
 	 * @param color 颜色
 	 */
-	private void shear(Graphics g, int w1, int h1, Color color) {
+	private void shear(final Graphics g, final int w1, final int h1, final Color color) {
 		shearX(g, w1, h1, color);
 		shearY(g, w1, h1, color);
 	}
@@ -106,15 +106,15 @@ public class ShearCaptcha extends AbstractCaptcha {
 	 * @param h1 高
 	 * @param color 颜色
 	 */
-	private void shearX(Graphics g, int w1, int h1, Color color) {
+	private void shearX(final Graphics g, final int w1, final int h1, final Color color) {
 
-		int period = RandomUtil.randomInt(this.width);
+		final int period = RandomUtil.randomInt(this.width);
 
-		int frames = 1;
-		int phase = RandomUtil.randomInt(2);
+		final int frames = 1;
+		final int phase = RandomUtil.randomInt(2);
 
 		for (int i = 0; i < h1; i++) {
-			double d = (double) (period >> 1) * Math.sin((double) i / (double) period + (6.2831853071795862D * (double) phase) / (double) frames);
+			final double d = (double) (period >> 1) * Math.sin((double) i / (double) period + (6.2831853071795862D * (double) phase) / (double) frames);
 			g.copyArea(0, i, w1, 1, (int) d, 0);
 			g.setColor(color);
 			g.drawLine((int) d, i, 0, i);
@@ -131,14 +131,14 @@ public class ShearCaptcha extends AbstractCaptcha {
 	 * @param h1 高
 	 * @param color 颜色
 	 */
-	private void shearY(Graphics g, int w1, int h1, Color color) {
+	private void shearY(final Graphics g, final int w1, final int h1, final Color color) {
 
-		int period = RandomUtil.randomInt(this.height >> 1);
+		final int period = RandomUtil.randomInt(this.height >> 1);
 
-		int frames = 20;
-		int phase = 7;
+		final int frames = 20;
+		final int phase = 7;
 		for (int i = 0; i < w1; i++) {
-			double d = (double) (period >> 1) * Math.sin((double) i / (double) period + (6.2831853071795862D * (double) phase) / (double) frames);
+			final double d = (double) (period >> 1) * Math.sin((double) i / (double) period + (6.2831853071795862D * (double) phase) / (double) frames);
 			g.copyArea(i, 0, 1, h1, 0, (int) d);
 			g.setColor(color);
 			// 擦除原位置的痕迹
@@ -160,16 +160,16 @@ public class ShearCaptcha extends AbstractCaptcha {
 	 * @param c 颜色
 	 */
 	@SuppressWarnings("SameParameterValue")
-	private void drawInterfere(Graphics g, int x1, int y1, int x2, int y2, int thickness, Color c) {
+	private void drawInterfere(final Graphics g, final int x1, final int y1, final int x2, final int y2, final int thickness, final Color c) {
 
 		// The thick line is in fact a filled polygon
 		g.setColor(c);
-		int dX = x2 - x1;
-		int dY = y2 - y1;
+		final int dX = x2 - x1;
+		final int dY = y2 - y1;
 		// line length
-		double lineLength = Math.sqrt(dX * dX + dY * dY);
+		final double lineLength = Math.sqrt(dX * dX + dY * dY);
 
-		double scale = (double) (thickness) / (2 * lineLength);
+		final double scale = (double) (thickness) / (2 * lineLength);
 
 		// The x and y increments from an endpoint needed to create a
 		// rectangle...
@@ -177,12 +177,12 @@ public class ShearCaptcha extends AbstractCaptcha {
 		double ddy = scale * (double) dX;
 		ddx += (ddx > 0) ? 0.5 : -0.5;
 		ddy += (ddy > 0) ? 0.5 : -0.5;
-		int dx = (int) ddx;
-		int dy = (int) ddy;
+		final int dx = (int) ddx;
+		final int dy = (int) ddy;
 
 		// Now we can compute the corner points...
-		int[] xPoints = new int[4];
-		int[] yPoints = new int[4];
+		final int[] xPoints = new int[4];
+		final int[] yPoints = new int[4];
 
 		xPoints[0] = x1 + dx;
 		yPoints[0] = y1 + dy;

hutool-swing/src/main/java/cn/hutool/swing/captcha/generator/AbstractGenerator.java

@@ -22,7 +22,7 @@ public abstract class AbstractGenerator implements CodeGenerator {
 	 *
 	 * @param count 生成验证码长度
 	 */
-	public AbstractGenerator(int count) {
+	public AbstractGenerator(final int count) {
 		this(RandomUtil.BASE_CHAR_NUMBER, count);
 	}
 
@@ -32,7 +32,7 @@ public abstract class AbstractGenerator implements CodeGenerator {
 	 * @param baseStr 基础字符集合，用于随机获取字符串的字符集合
 	 * @param length 生成验证码长度
 	 */
-	public AbstractGenerator(String baseStr, int length) {
+	public AbstractGenerator(final String baseStr, final int length) {
 		this.baseStr = baseStr;
 		this.length = length;
 	}

hutool-swing/src/main/java/cn/hutool/swing/captcha/generator/MathGenerator.java

@@ -31,7 +31,7 @@ public class MathGenerator implements CodeGenerator {
 	 *
 	 * @param numberLength 参与计算最大数字位数
 	 */
-	public MathGenerator(int numberLength) {
+	public MathGenerator(final int numberLength) {
 		this.numberLength = numberLength;
 	}
 
@@ -51,11 +51,11 @@ public class MathGenerator implements CodeGenerator {
 	}
 
 	@Override
-	public boolean verify(String code, String userInputCode) {
-		int result;
+	public boolean verify(final String code, final String userInputCode) {
+		final int result;
 		try {
 			result = Integer.parseInt(userInputCode);
-		} catch (NumberFormatException e) {
+		} catch (final NumberFormatException e) {
 			// 用户输入非数字
 			return false;
 		}

hutool-swing/src/main/java/cn/hutool/swing/captcha/generator/RandomGenerator.java

@@ -18,7 +18,7 @@ public class RandomGenerator extends AbstractGenerator {
 	 *
 	 * @param count 生成验证码长度
 	 */
-	public RandomGenerator(int count) {
+	public RandomGenerator(final int count) {
 		super(count);
 	}
 
@@ -28,7 +28,7 @@ public class RandomGenerator extends AbstractGenerator {
 	 * @param baseStr 基础字符集合，用于随机获取字符串的字符集合
 	 * @param length 生成验证码长度
 	 */
-	public RandomGenerator(String baseStr, int length) {
+	public RandomGenerator(final String baseStr, final int length) {
 		super(baseStr, length);
 	}
 
@@ -38,7 +38,7 @@ public class RandomGenerator extends AbstractGenerator {
 	}
 
 	@Override
-	public boolean verify(String code, String userInputCode) {
+	public boolean verify(final String code, final String userInputCode) {
 		if (StrUtil.isNotBlank(userInputCode)) {
 			return StrUtil.equalsIgnoreCase(code, userInputCode);
 		}

hutool-swing/src/main/java/cn/hutool/swing/clipboard/ClipboardMonitor.java

@@ -49,7 +49,7 @@ public enum ClipboardMonitor implements ClipboardOwner, Runnable, Closeable {
 	 * @param tryCount 尝试获取剪贴板内容的次数
 	 * @param delay 响应延迟，当从第二次开始，延迟一定毫秒数等待剪贴板可以获取，当tryCount小于2时无效
 	 */
-	ClipboardMonitor(int tryCount, long delay) {
+	ClipboardMonitor(final int tryCount, final long delay) {
 		this(tryCount, delay, ClipboardUtil.getClipboard());
 	}
 
@@ -60,7 +60,7 @@ public enum ClipboardMonitor implements ClipboardOwner, Runnable, Closeable {
 	 * @param delay 响应延迟，当从第二次开始，延迟一定毫秒数等待剪贴板可以获取，当tryCount小于2时无效
 	 * @param clipboard 剪贴板对象
 	 */
-	ClipboardMonitor(int tryCount, long delay, Clipboard clipboard) {
+	ClipboardMonitor(final int tryCount, final long delay, final Clipboard clipboard) {
 		this.tryCount = tryCount;
 		this.delay = delay;
 		this.clipboard = clipboard;
@@ -73,7 +73,7 @@ public enum ClipboardMonitor implements ClipboardOwner, Runnable, Closeable {
 	 * @param tryCount 重试次数
 	 * @return this
 	 */
-	public ClipboardMonitor setTryCount(int tryCount) {
+	public ClipboardMonitor setTryCount(final int tryCount) {
 		this.tryCount = tryCount;
 		return this;
 	}
@@ -84,7 +84,7 @@ public enum ClipboardMonitor implements ClipboardOwner, Runnable, Closeable {
 	 * @param delay 重试等待
 	 * @return this
 	 */
-	public ClipboardMonitor setDelay(long delay) {
+	public ClipboardMonitor setDelay(final long delay) {
 		this.delay = delay;
 		return this;
 	}
@@ -95,7 +95,7 @@ public enum ClipboardMonitor implements ClipboardOwner, Runnable, Closeable {
 	 * @param listener 监听事件处理
 	 * @return this
 	 */
-	public ClipboardMonitor addListener(ClipboardListener listener) {
+	public ClipboardMonitor addListener(final ClipboardListener listener) {
 		this.listenerSet.add(listener);
 		return this;
 	}
@@ -106,7 +106,7 @@ public enum ClipboardMonitor implements ClipboardOwner, Runnable, Closeable {
 	 * @param listener 监听
 	 * @return this
 	 */
-	public ClipboardMonitor removeListener(ClipboardListener listener) {
+	public ClipboardMonitor removeListener(final ClipboardListener listener) {
 		this.listenerSet.remove(listener);
 		return this;
 	}
@@ -122,20 +122,20 @@ public enum ClipboardMonitor implements ClipboardOwner, Runnable, Closeable {
 	}
 
 	@Override
-	public void lostOwnership(Clipboard clipboard, Transferable contents) {
-		Transferable newContents;
+	public void lostOwnership(final Clipboard clipboard, final Transferable contents) {
+		final Transferable newContents;
 		try {
 			newContents = tryGetContent(clipboard);
-		} catch (InterruptedException e) {
+		} catch (final InterruptedException e) {
 			// 中断后结束简体
 			return;
 		}
 
 		Transferable transferable = null;
-		for (ClipboardListener listener : listenerSet) {
+		for (final ClipboardListener listener : listenerSet) {
 			try {
 				transferable = listener.onChange(clipboard, ObjUtil.defaultIfNull(transferable, newContents));
-			} catch (Throwable e) {
+			} catch (final Throwable e) {
 				// 忽略事件处理异常，保证所有监听正常执行
 			}
 		}
@@ -160,7 +160,7 @@ public enum ClipboardMonitor implements ClipboardOwner, Runnable, Closeable {
 	 *
 	 * @param sync 是否阻塞
 	 */
-	public void listen(boolean sync) {
+	public void listen(final boolean sync) {
 		run();
 
 		if (sync) {
@@ -184,7 +184,7 @@ public enum ClipboardMonitor implements ClipboardOwner, Runnable, Closeable {
 	 * @return 剪贴板内容，{@code null} 表示未获取到
 	 * @throws InterruptedException 线程中断
 	 */
-	private Transferable tryGetContent(Clipboard clipboard) throws InterruptedException {
+	private Transferable tryGetContent(final Clipboard clipboard) throws InterruptedException {
 		Transferable newContents = null;
 		for (int i = 0; i < this.tryCount; i++) {
 			if (this.delay > 0 && i > 0) {
@@ -195,7 +195,7 @@ public enum ClipboardMonitor implements ClipboardOwner, Runnable, Closeable {
 
 			try {
 				newContents = clipboard.getContents(null);
-			} catch (IllegalStateException e) {
+			} catch (final IllegalStateException e) {
 				// ignore
 			}
 			if (null != newContents) {

hutool-swing/src/main/java/cn/hutool/swing/clipboard/ClipboardUtil.java

@@ -34,7 +34,7 @@ public class ClipboardUtil {
 	 *
 	 * @param contents 内容
 	 */
-	public static void set(Transferable contents) {
+	public static void set(final Transferable contents) {
 		set(contents, null);
 	}
 
@@ -44,7 +44,7 @@ public class ClipboardUtil {
 	 * @param contents 内容
 	 * @param owner 所有者
 	 */
-	public static void set(Transferable contents, ClipboardOwner owner) {
+	public static void set(final Transferable contents, final ClipboardOwner owner) {
 		getClipboard().setContents(contents, owner);
 	}
 
@@ -54,7 +54,7 @@ public class ClipboardUtil {
 	 * @param flavor 数据元信息，标识数据类型
 	 * @return 剪贴板内容，类型根据flavor不同而不同
 	 */
-	public static Object get(DataFlavor flavor) {
+	public static Object get(final DataFlavor flavor) {
 		return get(getClipboard().getContents(null), flavor);
 	}
 
@@ -65,11 +65,11 @@ public class ClipboardUtil {
 	 * @param flavor 数据元信息，标识数据类型
 	 * @return 剪贴板内容，类型根据flavor不同而不同
 	 */
-	public static Object get(Transferable content, DataFlavor flavor) {
+	public static Object get(final Transferable content, final DataFlavor flavor) {
 		if (null != content && content.isDataFlavorSupported(flavor)) {
 			try {
 				return content.getTransferData(flavor);
-			} catch (UnsupportedFlavorException | IOException e) {
+			} catch (final UnsupportedFlavorException | IOException e) {
 				throw new UtilException(e);
 			}
 		}
@@ -81,7 +81,7 @@ public class ClipboardUtil {
 	 *
 	 * @param text 字符串文本
 	 */
-	public static void setStr(String text) {
+	public static void setStr(final String text) {
 		set(new StringSelection(text));
 	}
 
@@ -101,7 +101,7 @@ public class ClipboardUtil {
 	 * @return 文本
 	 * @since 4.5.6
 	 */
-	public static String getStr(Transferable content) {
+	public static String getStr(final Transferable content) {
 		return (String) get(content, DataFlavor.stringFlavor);
 	}
 
@@ -110,7 +110,7 @@ public class ClipboardUtil {
 	 *
 	 * @param image 图像
 	 */
-	public static void setImage(Image image) {
+	public static void setImage(final Image image) {
 		set(new ImageSelection(image), null);
 	}
 
@@ -130,7 +130,7 @@ public class ClipboardUtil {
 	 * @return 图片
 	 * @since 4.5.6
 	 */
-	public static Image getImage(Transferable content) {
+	public static Image getImage(final Transferable content) {
 		return (Image) get(content, DataFlavor.imageFlavor);
 	}
 
@@ -141,7 +141,7 @@ public class ClipboardUtil {
 	 * @since 4.5.6
 	 * @see ClipboardMonitor#listen(boolean)
 	 */
-	public static void listen(ClipboardListener listener) {
+	public static void listen(final ClipboardListener listener) {
 		listen(listener, true);
 	}
 
@@ -153,7 +153,7 @@ public class ClipboardUtil {
 	 * @since 4.5.6
 	 * @see ClipboardMonitor#listen(boolean)
 	 */
-	public static void listen(ClipboardListener listener, boolean sync) {
+	public static void listen(final ClipboardListener listener, final boolean sync) {
 		listen(ClipboardMonitor.DEFAULT_TRY_COUNT, ClipboardMonitor.DEFAULT_DELAY, listener, sync);
 	}
 
@@ -167,7 +167,7 @@ public class ClipboardUtil {
 	 * @since 4.5.6
 	 * @see ClipboardMonitor#listen(boolean)
 	 */
-	public static void listen(int tryCount, long delay, ClipboardListener listener, boolean sync) {
+	public static void listen(final int tryCount, final long delay, final ClipboardListener listener, final boolean sync) {
 		ClipboardMonitor.INSTANCE//
 				.setTryCount(tryCount)//
 				.setDelay(delay)//

hutool-swing/src/main/java/cn/hutool/swing/clipboard/ImageSelection.java

@@ -23,7 +23,7 @@ public class ImageSelection implements Transferable, Serializable {
 	 *
 	 * @param image 图片
 	 */
-	public ImageSelection(Image image) {
+	public ImageSelection(final Image image) {
 		this.image = image;
 	}
 
@@ -44,7 +44,7 @@ public class ImageSelection implements Transferable, Serializable {
 	 * @return 是否支持
 	 */
 	@Override
-	public boolean isDataFlavorSupported(DataFlavor flavor) {
+	public boolean isDataFlavorSupported(final DataFlavor flavor) {
 		return DataFlavor.imageFlavor.equals(flavor);
 	}
 
@@ -55,7 +55,7 @@ public class ImageSelection implements Transferable, Serializable {
 	 * @return 转换后的对象
 	 */
 	@Override
-	public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException {
+	public Object getTransferData(final DataFlavor flavor) throws UnsupportedFlavorException {
 		if (false == DataFlavor.imageFlavor.equals(flavor)) {
 			throw new UnsupportedFlavorException(flavor);
 		}

hutool-swing/src/main/java/cn/hutool/swing/clipboard/StrClipboardListener.java

@@ -15,7 +15,7 @@ public abstract class StrClipboardListener implements ClipboardListener, Seriali
 	private static final long serialVersionUID = 1L;
 
 	@Override
-	public Transferable onChange(Clipboard clipboard, Transferable contents) {
+	public Transferable onChange(final Clipboard clipboard, final Transferable contents) {
 		if (contents.isDataFlavorSupported(DataFlavor.stringFlavor)) {
 			return onChange(clipboard, ClipboardUtil.getStr(contents));
 		}

hutool-swing/src/main/java/cn/hutool/swing/img/BackgroundRemoval.java

@@ -47,7 +47,7 @@ public class BackgroundRemoval {
 	 * @param tolerance  容差值[根据图片的主题色,加入容差值,值的范围在0~255之间]
 	 * @return 返回处理结果 true:图片处理完成 false:图片处理失败
 	 */
-	public static boolean backgroundRemoval(String inputPath, String outputPath, int tolerance) {
+	public static boolean backgroundRemoval(final String inputPath, final String outputPath, final int tolerance) {
 		return backgroundRemoval(new File(inputPath), new File(outputPath), tolerance);
 	}
 
@@ -65,7 +65,7 @@ public class BackgroundRemoval {
 	 * @param tolerance 容差值[根据图片的主题色,加入容差值,值的取值范围在0~255之间]
 	 * @return 返回处理结果 true:图片处理完成 false:图片处理失败
 	 */
-	public static boolean backgroundRemoval(File input, File output, int tolerance) {
+	public static boolean backgroundRemoval(final File input, final File output, final int tolerance) {
 		return backgroundRemoval(input, output, null, tolerance);
 	}
 
@@ -84,16 +84,16 @@ public class BackgroundRemoval {
 	 * @param tolerance 容差值[根据图片的主题色,加入容差值,值的取值范围在0~255之间]
 	 * @return 返回处理结果 true:图片处理完成 false:图片处理失败
 	 */
-	public static boolean backgroundRemoval(File input, File output, Color override, int tolerance) {
+	public static boolean backgroundRemoval(final File input, final File output, final Color override, final int tolerance) {
 		if (fileTypeValidation(input, IMAGES_TYPE)) {
 			return false;
 		}
 		try {
 			// 获取图片左上、中上、右上、右中、右下、下中、左下、左中、8个像素点rgb的16进制值
-			BufferedImage bufferedImage = ImageIO.read(input);
+			final BufferedImage bufferedImage = ImageIO.read(input);
 			// 图片输出的格式为 png
 			return ImageIO.write(backgroundRemoval(bufferedImage, override, tolerance), "png", output);
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			e.printStackTrace();
 			return false;
 		}
@@ -113,27 +113,27 @@ public class BackgroundRemoval {
 	 * @param tolerance     容差值[根据图片的主题色,加入容差值,值的取值范围在0~255之间]
 	 * @return 返回处理好的图片流
 	 */
-	public static BufferedImage backgroundRemoval(BufferedImage bufferedImage, Color override, int tolerance) {
+	public static BufferedImage backgroundRemoval(final BufferedImage bufferedImage, final Color override, int tolerance) {
 		// 容差值 最大255 最小0
 		tolerance = Math.min(255, Math.max(tolerance, 0));
 		// 绘制icon
-		ImageIcon imageIcon = new ImageIcon(bufferedImage);
-		BufferedImage image = new BufferedImage(imageIcon.getIconWidth(), imageIcon.getIconHeight(),
+		final ImageIcon imageIcon = new ImageIcon(bufferedImage);
+		final BufferedImage image = new BufferedImage(imageIcon.getIconWidth(), imageIcon.getIconHeight(),
 				BufferedImage.TYPE_4BYTE_ABGR);
 		// 绘图工具
-		Graphics graphics = image.getGraphics();
+		final Graphics graphics = image.getGraphics();
 		graphics.drawImage(imageIcon.getImage(), 0, 0, imageIcon.getImageObserver());
 		// 需要删除的RGB元素
-		String[] removeRgb = getRemoveRgb(bufferedImage);
+		final String[] removeRgb = getRemoveRgb(bufferedImage);
 		// 获取图片的大概主色调
-		String mainColor = getMainColor(bufferedImage);
-		int alpha = 0;
+		final String mainColor = getMainColor(bufferedImage);
+		final int alpha = 0;
 		for (int y = image.getMinY(); y < image.getHeight(); y++) {
 			for (int x = image.getMinX(); x < image.getWidth(); x++) {
 				// 获取像素的16进制
 				int rgb = image.getRGB(x, y);
-				String hex = ImgUtil.toHex((rgb & 0xff0000) >> 16, (rgb & 0xff00) >> 8, (rgb & 0xff));
-				boolean isTrue = ArrayUtil.contains(removeRgb, hex) ||
+				final String hex = ImgUtil.toHex((rgb & 0xff0000) >> 16, (rgb & 0xff00) >> 8, (rgb & 0xff));
+				final boolean isTrue = ArrayUtil.contains(removeRgb, hex) ||
 						areColorsWithinTolerance(hexToRgb(mainColor), new Color(Integer.parseInt(hex.substring(1), 16)), tolerance);
 				if (isTrue) {
 					rgb = override == null ? ((alpha + 1) << 24) | (rgb & 0x00ffffff) : override.getRGB();
@@ -159,10 +159,10 @@ public class BackgroundRemoval {
 	 * @param tolerance    容差值[根据图片的主题色,加入容差值,值的取值范围在0~255之间]
 	 * @return 返回处理好的图片流
 	 */
-	public static BufferedImage backgroundRemoval(ByteArrayOutputStream outputStream, Color override, int tolerance) {
+	public static BufferedImage backgroundRemoval(final ByteArrayOutputStream outputStream, final Color override, final int tolerance) {
 		try {
 			return backgroundRemoval(ImageIO.read(new ByteArrayInputStream(outputStream.toByteArray())), override, tolerance);
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			e.printStackTrace();
 			return null;
 		}
@@ -175,34 +175,34 @@ public class BackgroundRemoval {
 	 * @param image 图片流
 	 * @return String数组 包含 各个位置的rgb数值
 	 */
-	private static String[] getRemoveRgb(BufferedImage image) {
+	private static String[] getRemoveRgb(final BufferedImage image) {
 		// 获取图片流的宽和高
-		int width = image.getWidth() - 1;
-		int height = image.getHeight() - 1;
+		final int width = image.getWidth() - 1;
+		final int height = image.getHeight() - 1;
 		// 左上
-		int leftUpPixel = image.getRGB(1, 1);
-		String leftUp = ImgUtil.toHex((leftUpPixel & 0xff0000) >> 16, (leftUpPixel & 0xff00) >> 8, (leftUpPixel & 0xff));
+		final int leftUpPixel = image.getRGB(1, 1);
+		final String leftUp = ImgUtil.toHex((leftUpPixel & 0xff0000) >> 16, (leftUpPixel & 0xff00) >> 8, (leftUpPixel & 0xff));
 		// 上中
-		int upMiddlePixel = image.getRGB(width / 2, 1);
-		String upMiddle = ImgUtil.toHex((upMiddlePixel & 0xff0000) >> 16, (upMiddlePixel & 0xff00) >> 8, (upMiddlePixel & 0xff));
+		final int upMiddlePixel = image.getRGB(width / 2, 1);
+		final String upMiddle = ImgUtil.toHex((upMiddlePixel & 0xff0000) >> 16, (upMiddlePixel & 0xff00) >> 8, (upMiddlePixel & 0xff));
 		// 右上
-		int rightUpPixel = image.getRGB(width, 1);
-		String rightUp = ImgUtil.toHex((rightUpPixel & 0xff0000) >> 16, (rightUpPixel & 0xff00) >> 8, (rightUpPixel & 0xff));
+		final int rightUpPixel = image.getRGB(width, 1);
+		final String rightUp = ImgUtil.toHex((rightUpPixel & 0xff0000) >> 16, (rightUpPixel & 0xff00) >> 8, (rightUpPixel & 0xff));
 		// 右中
-		int rightMiddlePixel = image.getRGB(width, height / 2);
-		String rightMiddle = ImgUtil.toHex((rightMiddlePixel & 0xff0000) >> 16, (rightMiddlePixel & 0xff00) >> 8, (rightMiddlePixel & 0xff));
+		final int rightMiddlePixel = image.getRGB(width, height / 2);
+		final String rightMiddle = ImgUtil.toHex((rightMiddlePixel & 0xff0000) >> 16, (rightMiddlePixel & 0xff00) >> 8, (rightMiddlePixel & 0xff));
 		// 右下
-		int lowerRightPixel = image.getRGB(width, height);
-		String lowerRight = ImgUtil.toHex((lowerRightPixel & 0xff0000) >> 16, (lowerRightPixel & 0xff00) >> 8, (lowerRightPixel & 0xff));
+		final int lowerRightPixel = image.getRGB(width, height);
+		final String lowerRight = ImgUtil.toHex((lowerRightPixel & 0xff0000) >> 16, (lowerRightPixel & 0xff00) >> 8, (lowerRightPixel & 0xff));
 		// 下中
-		int lowerMiddlePixel = image.getRGB(width / 2, height);
-		String lowerMiddle = ImgUtil.toHex((lowerMiddlePixel & 0xff0000) >> 16, (lowerMiddlePixel & 0xff00) >> 8, (lowerMiddlePixel & 0xff));
+		final int lowerMiddlePixel = image.getRGB(width / 2, height);
+		final String lowerMiddle = ImgUtil.toHex((lowerMiddlePixel & 0xff0000) >> 16, (lowerMiddlePixel & 0xff00) >> 8, (lowerMiddlePixel & 0xff));
 		// 左下
-		int leftLowerPixel = image.getRGB(1, height);
-		String leftLower = ImgUtil.toHex((leftLowerPixel & 0xff0000) >> 16, (leftLowerPixel & 0xff00) >> 8, (leftLowerPixel & 0xff));
+		final int leftLowerPixel = image.getRGB(1, height);
+		final String leftLower = ImgUtil.toHex((leftLowerPixel & 0xff0000) >> 16, (leftLowerPixel & 0xff00) >> 8, (leftLowerPixel & 0xff));
 		// 左中
-		int leftMiddlePixel = image.getRGB(1, height / 2);
-		String leftMiddle = ImgUtil.toHex((leftMiddlePixel & 0xff0000) >> 16, (leftMiddlePixel & 0xff00) >> 8, (leftMiddlePixel & 0xff));
+		final int leftMiddlePixel = image.getRGB(1, height / 2);
+		final String leftMiddle = ImgUtil.toHex((leftMiddlePixel & 0xff0000) >> 16, (leftMiddlePixel & 0xff00) >> 8, (leftMiddlePixel & 0xff));
 		// 需要删除的RGB元素
 		return new String[]{leftUp, upMiddle, rightUp, rightMiddle, lowerRight, lowerMiddle, leftLower, leftMiddle};
 	}
@@ -213,7 +213,7 @@ public class BackgroundRemoval {
 	 * @param hex 十六进制颜色码
 	 * @return 返回 RGB颜色值
 	 */
-	public static Color hexToRgb(String hex) {
+	public static Color hexToRgb(final String hex) {
 		return new Color(Integer.parseInt(hex.substring(1), 16));
 	}
 
@@ -227,7 +227,7 @@ public class BackgroundRemoval {
 	 * @param tolerance 容差值
 	 * @return 返回true:两个颜色在容差值之内 false: 不在
 	 */
-	public static boolean areColorsWithinTolerance(Color color1, Color color2, int tolerance) {
+	public static boolean areColorsWithinTolerance(final Color color1, final Color color2, final int tolerance) {
 		return areColorsWithinTolerance(color1, color2, new Color(tolerance, tolerance, tolerance));
 	}
 
@@ -240,7 +240,7 @@ public class BackgroundRemoval {
 	 * @param tolerance 容差色值
 	 * @return 返回true:两个颜色在容差值之内 false: 不在
 	 */
-	public static boolean areColorsWithinTolerance(Color color1, Color color2, Color tolerance) {
+	public static boolean areColorsWithinTolerance(final Color color1, final Color color2, final Color tolerance) {
 		return (color1.getRed() - color2.getRed() < tolerance.getRed() && color1
 				.getRed() - color2.getRed() > -tolerance.getRed())
 				&& (color1.getBlue() - color2.getBlue() < tolerance
@@ -258,7 +258,7 @@ public class BackgroundRemoval {
 	 * @param input 图片文件路径
 	 * @return 返回一个图片的大概的色值 一个16进制的颜色码
 	 */
-	public static String getMainColor(String input) {
+	public static String getMainColor(final String input) {
 		return getMainColor(new File(input));
 	}
 
@@ -269,10 +269,10 @@ public class BackgroundRemoval {
 	 * @param input 图片文件
 	 * @return 返回一个图片的大概的色值 一个16进制的颜色码
 	 */
-	public static String getMainColor(File input) {
+	public static String getMainColor(final File input) {
 		try {
 			return getMainColor(ImageIO.read(input));
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			e.printStackTrace();
 		}
 		return "";
@@ -285,22 +285,22 @@ public class BackgroundRemoval {
 	 * @param bufferedImage 图片流
 	 * @return 返回一个图片的大概的色值 一个16进制的颜色码
 	 */
-	public static String getMainColor(BufferedImage bufferedImage) {
+	public static String getMainColor(final BufferedImage bufferedImage) {
 		if (bufferedImage == null) {
 			throw new IllegalArgumentException("图片流是空的");
 		}
 
 		// 存储图片的所有RGB元素
-		List<String> list = new ArrayList<>();
+		final List<String> list = new ArrayList<>();
 		for (int y = bufferedImage.getMinY(); y < bufferedImage.getHeight(); y++) {
 			for (int x = bufferedImage.getMinX(); x < bufferedImage.getWidth(); x++) {
-				int pixel = bufferedImage.getRGB(x, y);
+				final int pixel = bufferedImage.getRGB(x, y);
 				list.add(((pixel & 0xff0000) >> 16) + "-" + ((pixel & 0xff00) >> 8) + "-" + (pixel & 0xff));
 			}
 		}
 
-		Map<String, Integer> map = new HashMap<>(list.size());
-		for (String string : list) {
+		final Map<String, Integer> map = new HashMap<>(list.size());
+		for (final String string : list) {
 			Integer integer = map.get(string);
 			if (integer == null) {
 				integer = 1;
@@ -311,17 +311,17 @@ public class BackgroundRemoval {
 		}
 		String max = "";
 		long num = 0;
-		for (Map.Entry<String, Integer> entry : map.entrySet()) {
-			String key = entry.getKey();
-			Integer temp = entry.getValue();
+		for (final Map.Entry<String, Integer> entry : map.entrySet()) {
+			final String key = entry.getKey();
+			final Integer temp = entry.getValue();
 			if (StrUtil.isBlank(max) || temp > num) {
 				max = key;
 				num = temp;
 			}
 		}
-		String[] strings = max.split("-");
+		final String[] strings = max.split("-");
 		// rgb 的数量只有3个
-		int rgbLength = 3;
+		final int rgbLength = 3;
 		if (strings.length == rgbLength) {
 			return ImgUtil.toHex(Integer.parseInt(strings[0]), Integer.parseInt(strings[1]),
 					Integer.parseInt(strings[2]));
@@ -339,12 +339,12 @@ public class BackgroundRemoval {
 	 * @param imagesType 文件包含的类型数组
 	 * @return 返回布尔值 false:给定文件的文件类型在文件数组中  true:给定文件的文件类型 不在给定数组中。
 	 */
-	private static boolean fileTypeValidation(File input, String[] imagesType) {
+	private static boolean fileTypeValidation(final File input, final String[] imagesType) {
 		if (!input.exists()) {
 			throw new IllegalArgumentException("给定文件为空");
 		}
 		// 获取图片类型
-		String type = FileTypeUtil.getType(input);
+		final String type = FileTypeUtil.getType(input);
 		// 类型对比
 		if (!ArrayUtil.contains(imagesType, type)) {
 			throw new IllegalArgumentException(StrUtil.format("文件类型{}不支持", type));

hutool-swing/src/main/java/cn/hutool/swing/img/FontUtil.java

@@ -34,7 +34,7 @@ public class FontUtil {
 	 * @param size 字体大小
 	 * @return 字体
 	 */
-	public static Font createSansSerifFont(int size) {
+	public static Font createSansSerifFont(final int size) {
 		return createFont(Font.SANS_SERIF, size);
 	}
 
@@ -45,7 +45,7 @@ public class FontUtil {
 	 * @param size 字体大小
 	 * @return 字体
 	 */
-	public static Font createFont(String name, int size) {
+	public static Font createFont(final String name, final int size) {
 		return new Font(name, Font.PLAIN, size);
 	}
 
@@ -56,17 +56,17 @@ public class FontUtil {
 	 * @param fontFile 字体文件
 	 * @return {@link Font}
 	 */
-	public static Font createFont(File fontFile) {
+	public static Font createFont(final File fontFile) {
 		try {
 			return Font.createFont(Font.TRUETYPE_FONT, fontFile);
-		} catch (FontFormatException e) {
+		} catch (final FontFormatException e) {
 			// True Type字体无效时使用Type1字体
 			try {
 				return Font.createFont(Font.TYPE1_FONT, fontFile);
-			} catch (Exception e1) {
+			} catch (final Exception e1) {
 				throw new UtilException(e);
 			}
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			throw new IORuntimeException(e);
 		}
 	}
@@ -78,17 +78,17 @@ public class FontUtil {
 	 * @param fontStream 字体流
 	 * @return {@link Font}
 	 */
-	public static Font createFont(InputStream fontStream) {
+	public static Font createFont(final InputStream fontStream) {
 		try {
 			return Font.createFont(Font.TRUETYPE_FONT, fontStream);
-		} catch (FontFormatException e) {
+		} catch (final FontFormatException e) {
 			// True Type字体无效时使用Type1字体
 			try {
 				return Font.createFont(Font.TYPE1_FONT, fontStream);
-			} catch (Exception e1) {
+			} catch (final Exception e1) {
 				throw new UtilException(e1);
 			}
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			throw new IORuntimeException(e);
 		}
 	}
@@ -100,7 +100,7 @@ public class FontUtil {
 	 * @param str  字符串
 	 * @return 长宽信息
 	 */
-	public static Dimension getDimension(FontMetrics metrics, String str) {
+	public static Dimension getDimension(final FontMetrics metrics, final String str) {
 		final int width = metrics.stringWidth(str);
 		final int height = metrics.getAscent() - metrics.getLeading() - metrics.getDescent();
 

hutool-swing/src/main/java/cn/hutool/swing/img/GraphicsUtil.java

@@ -31,7 +31,7 @@ public class GraphicsUtil {
 	 * @return {@link Graphics2D}
 	 * @since 4.5.2
 	 */
-	public static Graphics2D createGraphics(BufferedImage image, Color color) {
+	public static Graphics2D createGraphics(final BufferedImage image, final Color color) {
 		final Graphics2D g = image.createGraphics();
 
 		if (null != color) {
@@ -52,15 +52,15 @@ public class GraphicsUtil {
 	 * @return 最小高度，-1表示无法获取
 	 * @since 4.5.17
 	 */
-	public static int getCenterY(Graphics g, int backgroundHeight) {
+	public static int getCenterY(final Graphics g, final int backgroundHeight) {
 		// 获取允许文字最小高度
 		FontMetrics metrics = null;
 		try {
 			metrics = g.getFontMetrics();
-		} catch (Exception e) {
+		} catch (final Exception e) {
 			// 此处报告bug某些情况下会抛出IndexOutOfBoundsException，在此做容错处理
 		}
-		int y;
+		final int y;
 		if (null != metrics) {
 			y = (backgroundHeight - metrics.getHeight()) / 2 + metrics.getAscent();
 		} else {
@@ -80,7 +80,7 @@ public class GraphicsUtil {
 	 * @return 画笔对象
 	 * @since 4.5.10
 	 */
-	public static Graphics drawStringColourful(Graphics g, String str, Font font, int width, int height) {
+	public static Graphics drawStringColourful(final Graphics g, final String str, final Font font, final int width, final int height) {
 		return drawString(g, str, font, null, width, height);
 	}
 
@@ -96,7 +96,7 @@ public class GraphicsUtil {
 	 * @return 画笔对象
 	 * @since 4.5.10
 	 */
-	public static Graphics drawString(Graphics g, String str, Font font, Color color, int width, int height) {
+	public static Graphics drawString(final Graphics g, final String str, final Font font, final Color color, final int width, final int height) {
 		// 抗锯齿
 		if (g instanceof Graphics2D) {
 			((Graphics2D) g).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
@@ -105,13 +105,13 @@ public class GraphicsUtil {
 		g.setFont(font);
 
 		// 文字高度（必须在设置字体后调用）
-		int midY = getCenterY(g, height);
+		final int midY = getCenterY(g, height);
 		if (null != color) {
 			g.setColor(color);
 		}
 
 		final int len = str.length();
-		int charWidth = width / len;
+		final int charWidth = width / len;
 		for (int i = 0; i < len; i++) {
 			if (null == color) {
 				// 产生随机的颜色值，让输出的每个字符的颜色值都将不同。
@@ -134,7 +134,7 @@ public class GraphicsUtil {
 	 * @return 画笔对象
 	 * @since 4.5.10
 	 */
-	public static Graphics drawString(Graphics g, String str, Font font, Color color, Rectangle rectangle) {
+	public static Graphics drawString(final Graphics g, final String str, final Font font, final Color color, final Rectangle rectangle) {
 		// 背景长宽
 		final int backgroundWidth = rectangle.width;
 		final int backgroundHeight = rectangle.height;
@@ -143,7 +143,7 @@ public class GraphicsUtil {
 		Dimension dimension;
 		try {
 			dimension = FontUtil.getDimension(g.getFontMetrics(font), str);
-		} catch (Exception e) {
+		} catch (final Exception e) {
 			// 此处报告bug某些情况下会抛出IndexOutOfBoundsException，在此做容错处理
 			dimension = new Dimension(backgroundWidth / 3, backgroundHeight / 3);
 		}
@@ -165,7 +165,7 @@ public class GraphicsUtil {
 	 * @return 画笔对象
 	 * @since 5.3.6
 	 */
-	public static Graphics drawString(Graphics g, String str, Font font, Color color, Point point) {
+	public static Graphics drawString(final Graphics g, final String str, final Font font, final Color color, final Point point) {
 		// 抗锯齿
 		if (g instanceof Graphics2D) {
 			((Graphics2D) g).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
@@ -186,7 +186,7 @@ public class GraphicsUtil {
 	 * @param point 绘制的位置，基于左上角
 	 * @return 画笔对象
 	 */
-	public static Graphics drawImg(Graphics g, Image img, Point point) {
+	public static Graphics drawImg(final Graphics g, final Image img, final Point point) {
 		return drawImg(g, img,
 				new Rectangle(point.x, point.y, img.getWidth(null), img.getHeight(null)));
 	}
@@ -199,7 +199,7 @@ public class GraphicsUtil {
 	 * @param rectangle 矩形对象，表示矩形区域的x，y，width，height,，基于左上角
 	 * @return 画笔对象
 	 */
-	public static Graphics drawImg(Graphics g, Image img, Rectangle rectangle) {
+	public static Graphics drawImg(final Graphics g, final Image img, final Rectangle rectangle) {
 		g.drawImage(img, rectangle.x, rectangle.y, rectangle.width, rectangle.height, null); // 绘制切割后的图
 		return g;
 	}
@@ -211,7 +211,7 @@ public class GraphicsUtil {
 	 * @param alpha 透明度：alpha 必须是范围 [0.0, 1.0] 之内（包含边界值）的一个浮点数字
 	 * @return 画笔
 	 */
-	public static Graphics2D setAlpha(Graphics2D g, float alpha){
+	public static Graphics2D setAlpha(final Graphics2D g, final float alpha){
 		g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, alpha));
 		return g;
 	}

hutool-swing/src/main/java/cn/hutool/swing/img/Img.java

@@ -67,7 +67,7 @@ public class Img implements Serializable {
 	 * @param imagePath 图片文件路径
 	 * @return Img
 	 */
-	public static Img from(Path imagePath) {
+	public static Img from(final Path imagePath) {
 		return from(imagePath.toFile());
 	}
 
@@ -77,7 +77,7 @@ public class Img implements Serializable {
 	 * @param imageFile 图片文件
 	 * @return Img
 	 */
-	public static Img from(File imageFile) {
+	public static Img from(final File imageFile) {
 		return new Img(ImgUtil.read(imageFile));
 	}
 
@@ -88,7 +88,7 @@ public class Img implements Serializable {
 	 * @return Img
 	 * @since 4.4.1
 	 */
-	public static Img from(Resource resource) {
+	public static Img from(final Resource resource) {
 		return from(resource.getStream());
 	}
 
@@ -98,7 +98,7 @@ public class Img implements Serializable {
 	 * @param in 图片流
 	 * @return Img
 	 */
-	public static Img from(InputStream in) {
+	public static Img from(final InputStream in) {
 		return new Img(ImgUtil.read(in));
 	}
 
@@ -108,7 +108,7 @@ public class Img implements Serializable {
 	 * @param imageStream 图片流
 	 * @return Img
 	 */
-	public static Img from(ImageInputStream imageStream) {
+	public static Img from(final ImageInputStream imageStream) {
 		return new Img(ImgUtil.read(imageStream));
 	}
 
@@ -118,7 +118,7 @@ public class Img implements Serializable {
 	 * @param imageUrl 图片URL
 	 * @return Img
 	 */
-	public static Img from(URL imageUrl) {
+	public static Img from(final URL imageUrl) {
 		return new Img(ImgUtil.read(imageUrl));
 	}
 
@@ -128,7 +128,7 @@ public class Img implements Serializable {
 	 * @param image 图片
 	 * @return Img
 	 */
-	public static Img from(Image image) {
+	public static Img from(final Image image) {
 		return new Img(ImgUtil.toBufferedImage(image));
 	}
 
@@ -137,7 +137,7 @@ public class Img implements Serializable {
 	 *
 	 * @param srcImage 来源图片
 	 */
-	public Img(BufferedImage srcImage) {
+	public Img(final BufferedImage srcImage) {
 		this(srcImage, null);
 	}
 
@@ -148,7 +148,7 @@ public class Img implements Serializable {
 	 * @param targetImageType 目标图片类型，null则读取来源图片类型
 	 * @since 5.0.7
 	 */
-	public Img(BufferedImage srcImage, String targetImageType) {
+	public Img(final BufferedImage srcImage, String targetImageType) {
 		this.srcImage = srcImage;
 		if (null == targetImageType) {
 			if (srcImage.getType() == BufferedImage.TYPE_INT_ARGB
@@ -172,7 +172,7 @@ public class Img implements Serializable {
 	 * @see ImgUtil#IMAGE_TYPE_JPG
 	 * @see ImgUtil#IMAGE_TYPE_PNG
 	 */
-	public Img setTargetImageType(String imgType) {
+	public Img setTargetImageType(final String imgType) {
 		this.targetImageType = imgType;
 		return this;
 	}
@@ -184,7 +184,7 @@ public class Img implements Serializable {
 	 * @return this
 	 * @since 4.1.15
 	 */
-	public Img setPositionBaseCentre(boolean positionBaseCentre) {
+	public Img setPositionBaseCentre(final boolean positionBaseCentre) {
 		this.positionBaseCentre = positionBaseCentre;
 		return this;
 	}
@@ -196,7 +196,7 @@ public class Img implements Serializable {
 	 * @return this
 	 * @since 4.3.2
 	 */
-	public Img setQuality(double quality) {
+	public Img setQuality(final double quality) {
 		return setQuality((float) quality);
 	}
 
@@ -207,7 +207,7 @@ public class Img implements Serializable {
 	 * @return this
 	 * @since 4.3.2
 	 */
-	public Img setQuality(float quality) {
+	public Img setQuality(final float quality) {
 		if (quality > 0 && quality < 1) {
 			this.quality = quality;
 		} else {
@@ -253,7 +253,7 @@ public class Img implements Serializable {
 	 * @param height 目标高度
 	 * @return this
 	 */
-	public Img scale(int width, int height) {
+	public Img scale(final int width, final int height) {
 		return scale(width, height, Image.SCALE_SMOOTH);
 	}
 
@@ -267,11 +267,11 @@ public class Img implements Serializable {
 	 * @return this
 	 * @since 5.7.18
 	 */
-	public Img scale(int width, int height, int scaleType) {
+	public Img scale(final int width, final int height, final int scaleType) {
 		final Image srcImg = getValidSrcImg();
 
-		int srcHeight = srcImg.getHeight(null);
-		int srcWidth = srcImg.getWidth(null);
+		final int srcHeight = srcImg.getHeight(null);
+		final int srcWidth = srcImg.getWidth(null);
 		if (srcHeight == height && srcWidth == width) {
 			// 源与目标长宽一致返回原图
 			this.targetImage = srcImg;
@@ -300,12 +300,12 @@ public class Img implements Serializable {
 	 * @param fixedColor 比例不对时补充的颜色，不补充为{@code null}
 	 * @return this
 	 */
-	public Img scale(int width, int height, Color fixedColor) {
+	public Img scale(final int width, final int height, final Color fixedColor) {
 		Image srcImage = getValidSrcImg();
 		int srcHeight = srcImage.getHeight(null);
 		int srcWidth = srcImage.getWidth(null);
-		double heightRatio = NumberUtil.div(height, srcHeight);
-		double widthRatio = NumberUtil.div(width, srcWidth);
+		final double heightRatio = NumberUtil.div(height, srcHeight);
+		final double widthRatio = NumberUtil.div(width, srcWidth);
 
 		// 浮点数之间的等值判断,基本数据类型不能用==比较,包装数据类型不能用equals来判断。
 		if (NumberUtil.equals(heightRatio, widthRatio)) {
@@ -325,7 +325,7 @@ public class Img implements Serializable {
 		srcWidth = srcImage.getWidth(null);
 
 		final BufferedImage image = new BufferedImage(width, height, getTypeInt());
-		Graphics2D g = image.createGraphics();
+		final Graphics2D g = image.createGraphics();
 
 		// 设置背景
 		if (null != fixedColor) {
@@ -347,7 +347,7 @@ public class Img implements Serializable {
 	 * @param rectangle 矩形对象，表示矩形区域的x，y，width，height
 	 * @return this
 	 */
-	public Img cut(Rectangle rectangle) {
+	public Img cut(final Rectangle rectangle) {
 		final Image srcImage = getValidSrcImg();
 		fixRectangle(rectangle, srcImage.getWidth(null), srcImage.getHeight(null));
 
@@ -364,7 +364,7 @@ public class Img implements Serializable {
 	 * @return this
 	 * @since 4.1.15
 	 */
-	public Img cut(int x, int y) {
+	public Img cut(final int x, final int y) {
 		return cut(x, y, -1);
 	}
 
@@ -377,7 +377,7 @@ public class Img implements Serializable {
 	 * @return this
 	 * @since 4.1.15
 	 */
-	public Img cut(int x, int y, int radius) {
+	public Img cut(int x, int y, final int radius) {
 		final Image srcImage = getValidSrcImg();
 		final int width = srcImage.getWidth(null);
 		final int height = srcImage.getHeight(null);
@@ -458,7 +458,7 @@ public class Img implements Serializable {
 	 * @param alpha     透明度：alpha 必须是范围 [0.0, 1.0] 之内（包含边界值）的一个浮点数字
 	 * @return 处理后的图像
 	 */
-	public Img pressText(String pressText, Color color, Font font, int x, int y, float alpha) {
+	public Img pressText(final String pressText, final Color color, final Font font, final int x, final int y, final float alpha) {
 		return pressText(pressText, color, font, new Point(x, y), alpha);
 	}
 
@@ -473,7 +473,7 @@ public class Img implements Serializable {
 	 * @param alpha     透明度：alpha 必须是范围 [0.0, 1.0] 之内（包含边界值）的一个浮点数字
 	 * @return 处理后的图像
 	 */
-	public Img pressText(String pressText, Color color, Font font, Point point, float alpha) {
+	public Img pressText(final String pressText, final Color color, Font font, final Point point, final float alpha) {
 		final BufferedImage targetImage = ImgUtil.toBufferedImage(getValidSrcImg(), this.targetImageType);
 
 		if (null == font) {
@@ -515,7 +515,7 @@ public class Img implements Serializable {
 	 * @return 处理后的图像
 	 * @since 5.8.0
 	 */
-	public Img pressTextFull(String pressText, Color color, Font font, int lineHeight, int degree, float alpha) {
+	public Img pressTextFull(final String pressText, final Color color, Font font, final int lineHeight, final int degree, final float alpha) {
 		final BufferedImage targetImage = ImgUtil.toBufferedImage(getValidSrcImg(), this.targetImageType);
 
 		if (null == font) {
@@ -536,7 +536,7 @@ public class Img implements Serializable {
 		Dimension dimension;
 		try {
 			dimension = FontUtil.getDimension(g.getFontMetrics(font), pressText);
-		} catch (Exception e) {
+		} catch (final Exception e) {
 			// 此处报告bug某些情况下会抛出IndexOutOfBoundsException，在此做容错处理
 			dimension = new Dimension(targetWidth / 3, targetHeight / 3);
 		}
@@ -566,7 +566,7 @@ public class Img implements Serializable {
 	 * @param alpha    透明度：alpha 必须是范围 [0.0, 1.0] 之内（包含边界值）的一个浮点数字
 	 * @return this
 	 */
-	public Img pressImage(Image pressImg, int x, int y, float alpha) {
+	public Img pressImage(final Image pressImg, final int x, final int y, final float alpha) {
 		final int pressImgWidth = pressImg.getWidth(null);
 		final int pressImgHeight = pressImg.getHeight(null);
 		return pressImage(pressImg, new Rectangle(x, y, pressImgWidth, pressImgHeight), alpha);
@@ -581,7 +581,7 @@ public class Img implements Serializable {
 	 * @return this
 	 * @since 4.1.14
 	 */
-	public Img pressImage(Image pressImg, Rectangle rectangle, float alpha) {
+	public Img pressImage(final Image pressImg, final Rectangle rectangle, final float alpha) {
 		final Image targetImg = getValidSrcImg();
 
 		this.targetImage = draw(ImgUtil.toBufferedImage(targetImg, this.targetImageType), pressImg, rectangle, alpha);
@@ -596,13 +596,13 @@ public class Img implements Serializable {
 	 * @return 旋转后的图片
 	 * @since 3.2.2
 	 */
-	public Img rotate(int degree) {
+	public Img rotate(final int degree) {
 		final Image image = getValidSrcImg();
-		int width = image.getWidth(null);
-		int height = image.getHeight(null);
+		final int width = image.getWidth(null);
+		final int height = image.getHeight(null);
 		final Rectangle rectangle = calcRotatedSize(width, height, degree);
 		final BufferedImage targetImg = new BufferedImage(rectangle.width, rectangle.height, getTypeInt());
-		Graphics2D graphics2d = targetImg.createGraphics();
+		final Graphics2D graphics2d = targetImg.createGraphics();
 		// 抗锯齿
 		graphics2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
 		// 从中心旋转
@@ -621,10 +621,10 @@ public class Img implements Serializable {
 	 */
 	public Img flip() {
 		final Image image = getValidSrcImg();
-		int width = image.getWidth(null);
-		int height = image.getHeight(null);
+		final int width = image.getWidth(null);
+		final int height = image.getHeight(null);
 		final BufferedImage targetImg = new BufferedImage(width, height, getTypeInt());
-		Graphics2D graphics2d = targetImg.createGraphics();
+		final Graphics2D graphics2d = targetImg.createGraphics();
 		graphics2d.drawImage(image, 0, 0, width, height, width, 0, 0, height, null);
 		graphics2d.dispose();
 
@@ -640,7 +640,7 @@ public class Img implements Serializable {
 	 * @return this
 	 * @since 5.4.1
 	 */
-	public Img stroke(Color color, float width) {
+	public Img stroke(final Color color, final float width) {
 		return stroke(color, new BasicStroke(width));
 	}
 
@@ -652,11 +652,11 @@ public class Img implements Serializable {
 	 * @return this
 	 * @since 5.4.1
 	 */
-	public Img stroke(Color color, Stroke stroke) {
+	public Img stroke(final Color color, final Stroke stroke) {
 		final BufferedImage image = ImgUtil.toBufferedImage(getValidSrcImg(), this.targetImageType);
-		int width = image.getWidth(null);
-		int height = image.getHeight(null);
-		Graphics2D g = image.createGraphics();
+		final int width = image.getWidth(null);
+		final int height = image.getHeight(null);
+		final Graphics2D g = image.createGraphics();
 
 		g.setColor(ObjUtil.defaultIfNull(color, Color.BLACK));
 		if (null != stroke) {
@@ -690,7 +690,7 @@ public class Img implements Serializable {
 	 * @return 是否成功写出，如果返回false表示未找到合适的Writer
 	 * @throws IORuntimeException IO异常
 	 */
-	public boolean write(OutputStream out) throws IORuntimeException {
+	public boolean write(final OutputStream out) throws IORuntimeException {
 		return write(ImgUtil.getImageOutputStream(out));
 	}
 
@@ -702,7 +702,7 @@ public class Img implements Serializable {
 	 * @return 是否成功写出，如果返回false表示未找到合适的Writer
 	 * @throws IORuntimeException IO异常
 	 */
-	public boolean write(ImageOutputStream targetImageStream) throws IORuntimeException {
+	public boolean write(final ImageOutputStream targetImageStream) throws IORuntimeException {
 		Assert.notBlank(this.targetImageType, "Target image type is blank !");
 		Assert.notNull(targetImageStream, "Target output stream is null !");
 
@@ -719,7 +719,7 @@ public class Img implements Serializable {
 	 * @return 是否成功写出，如果返回false表示未找到合适的Writer
 	 * @throws IORuntimeException IO异常
 	 */
-	public boolean write(File targetFile) throws IORuntimeException {
+	public boolean write(final File targetFile) throws IORuntimeException {
 		final String formatName = FileUtil.extName(targetFile);
 		if (StrUtil.isNotBlank(formatName)) {
 			this.targetImageType = formatName;
@@ -750,7 +750,7 @@ public class Img implements Serializable {
 	 * @param alpha         透明度：alpha 必须是范围 [0.0, 1.0] 之内（包含边界值）的一个浮点数字
 	 * @return 绘制后的背景
 	 */
-	private BufferedImage draw(BufferedImage backgroundImg, Image img, Rectangle rectangle, float alpha) {
+	private BufferedImage draw(final BufferedImage backgroundImg, final Image img, final Rectangle rectangle, final float alpha) {
 		final Graphics2D g = backgroundImg.createGraphics();
 		GraphicsUtil.setAlpha(g, alpha);
 
@@ -807,7 +807,7 @@ public class Img implements Serializable {
 	 * @return 修正后的{@link Rectangle}
 	 * @since 4.1.15
 	 */
-	private Rectangle fixRectangle(Rectangle rectangle, int baseWidth, int baseHeight) {
+	private Rectangle fixRectangle(final Rectangle rectangle, final int baseWidth, final int baseHeight) {
 		if (this.positionBaseCentre) {
 			final Point pointBaseCentre = ImgUtil.getPointBaseCentre(rectangle, baseWidth, baseHeight);
 			// 修正图片位置从背景的中心计算
@@ -832,22 +832,22 @@ public class Img implements Serializable {
 		}
 		if (degree >= 90) {
 			if (degree / 90 % 2 == 1) {
-				int temp = height;
+				final int temp = height;
 				//noinspection SuspiciousNameCombination
 				height = width;
 				width = temp;
 			}
 			degree = degree % 90;
 		}
-		double r = Math.sqrt(height * height + width * width) / 2;
-		double len = 2 * Math.sin(Math.toRadians(degree) / 2) * r;
-		double angel_alpha = (Math.PI - Math.toRadians(degree)) / 2;
-		double angel_dalta_width = Math.atan((double) height / width);
-		double angel_dalta_height = Math.atan((double) width / height);
-		int len_dalta_width = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_width));
-		int len_dalta_height = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_height));
-		int des_width = width + len_dalta_width * 2;
-		int des_height = height + len_dalta_height * 2;
+		final double r = Math.sqrt(height * height + width * width) / 2;
+		final double len = 2 * Math.sin(Math.toRadians(degree) / 2) * r;
+		final double angel_alpha = (Math.PI - Math.toRadians(degree)) / 2;
+		final double angel_dalta_width = Math.atan((double) height / width);
+		final double angel_dalta_height = Math.atan((double) width / height);
+		final int len_dalta_width = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_width));
+		final int len_dalta_height = (int) (len * Math.cos(Math.PI - angel_alpha - angel_dalta_height));
+		final int des_width = width + len_dalta_width * 2;
+		final int des_height = height + len_dalta_height * 2;
 
 		return new Rectangle(des_width, des_height);
 	}

hutool-swing/src/main/java/cn/hutool/swing/img/ScaleType.java

@@ -31,7 +31,7 @@ public enum ScaleType {
 	 * @see Image#SCALE_REPLICATE
 	 * @see Image#SCALE_AREA_AVERAGING
 	 */
-	ScaleType(int value) {
+	ScaleType(final int value) {
 		this.value = value;
 	}
 

hutool-swing/src/main/java/cn/hutool/swing/img/gif/AnimatedGifEncoder.java

@@ -61,7 +61,7 @@ public class AnimatedGifEncoder {
 	 *
 	 * @param ms 间隔时间，单位毫秒
 	 */
-	public void setDelay(int ms) {
+	public void setDelay(final int ms) {
 		delay = Math.round(ms / 10.0f);
 	}
 
@@ -72,7 +72,7 @@ public class AnimatedGifEncoder {
 	 *
 	 * @param code int disposal code.
 	 */
-	public void setDispose(int code) {
+	public void setDispose(final int code) {
 		if (code >= 0) {
 			dispose = code;
 		}
@@ -86,7 +86,7 @@ public class AnimatedGifEncoder {
 	 *
 	 * @param iter int number of iterations.
 	 */
-	public void setRepeat(int iter) {
+	public void setRepeat(final int iter) {
 		if (iter >= 0) {
 			repeat = iter;
 		}
@@ -103,7 +103,7 @@ public class AnimatedGifEncoder {
 	 *
 	 * @param c Color to be treated as transparent on display.
 	 */
-	public void setTransparent(Color c) {
+	public void setTransparent(final Color c) {
 		setTransparent(c, false);
 	}
 
@@ -122,7 +122,7 @@ public class AnimatedGifEncoder {
 	 * @param c          Color to be treated as transparent on display.
 	 * @param exactMatch If exactMatch is set to true, transparent color index is search with exact match
 	 */
-	public void setTransparent(Color c, boolean exactMatch) {
+	public void setTransparent(final Color c, final boolean exactMatch) {
 		transparent = c;
 		transparentExactMatch = exactMatch;
 	}
@@ -140,7 +140,7 @@ public class AnimatedGifEncoder {
 	 *
 	 * @param c Color to be treated as background on display.
 	 */
-	public void setBackground(Color c) {
+	public void setBackground(final Color c) {
 		background = c;
 	}
 
@@ -154,7 +154,7 @@ public class AnimatedGifEncoder {
 	 * @param im BufferedImage containing frame to write.
 	 * @return true if successful.
 	 */
-	public boolean addFrame(BufferedImage im) {
+	public boolean addFrame(final BufferedImage im) {
 		if ((im == null) || !started) {
 			return false;
 		}
@@ -182,7 +182,7 @@ public class AnimatedGifEncoder {
 			}
 			writePixels(); // encode and write pixel data
 			firstFrame = false;
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			ok = false;
 		}
 
@@ -206,7 +206,7 @@ public class AnimatedGifEncoder {
 			if (closeStream) {
 				out.close();
 			}
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			ok = false;
 		}
 
@@ -229,7 +229,7 @@ public class AnimatedGifEncoder {
 	 *
 	 * @param fps float frame rate (frames per second)
 	 */
-	public void setFrameRate(float fps) {
+	public void setFrameRate(final float fps) {
 		if (fps != 0f) {
 			delay = Math.round(100f / fps);
 		}
@@ -258,7 +258,7 @@ public class AnimatedGifEncoder {
 	 * @param w int frame width.
 	 * @param h int frame width.
 	 */
-	public void setSize(int w, int h) {
+	public void setSize(final int w, final int h) {
 		if (started && !firstFrame) return;
 		width = w;
 		height = h;
@@ -274,14 +274,14 @@ public class AnimatedGifEncoder {
 	 * @param os OutputStream on which GIF images are written.
 	 * @return false if initial write failed.
 	 */
-	public boolean start(OutputStream os) {
+	public boolean start(final OutputStream os) {
 		if (os == null) return false;
 		boolean ok = true;
 		closeStream = false;
 		out = os;
 		try {
 			writeString("GIF89a"); // header
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			ok = false;
 		}
 		return started = ok;
@@ -293,13 +293,13 @@ public class AnimatedGifEncoder {
 	 * @param file String containing output file name.
 	 * @return false if open or initial write failed.
 	 */
-	public boolean start(String file) {
+	public boolean start(final String file) {
 		boolean ok;
 		try {
 			out = new BufferedOutputStream(new FileOutputStream(file));
 			ok = start(out);
 			closeStream = true;
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			ok = false;
 		}
 		return started = ok;
@@ -313,15 +313,15 @@ public class AnimatedGifEncoder {
 	 * Analyzes image colors and creates color map.
 	 */
 	protected void analyzePixels() {
-		int len = pixels.length;
-		int nPix = len / 3;
+		final int len = pixels.length;
+		final int nPix = len / 3;
 		indexedPixels = new byte[nPix];
-		NeuQuant nq = new NeuQuant(pixels, len, sample);
+		final NeuQuant nq = new NeuQuant(pixels, len, sample);
 		// initialize quantizer
 		colorTab = nq.process(); // create reduced palette
 		// convert map from BGR to RGB
 		for (int i = 0; i < colorTab.length; i += 3) {
-			byte temp = colorTab[i];
+			final byte temp = colorTab[i];
 			colorTab[i] = colorTab[i + 2];
 			colorTab[i + 2] = temp;
 			usedEntry[i / 3] = false;
@@ -329,7 +329,7 @@ public class AnimatedGifEncoder {
 		// map image pixels to new palette
 		int k = 0;
 		for (int i = 0; i < nPix; i++) {
-			int index =
+			final int index =
 					nq.map(pixels[k++] & 0xff,
 							pixels[k++] & 0xff,
 							pixels[k++] & 0xff);
@@ -351,20 +351,20 @@ public class AnimatedGifEncoder {
 	 * @param c Color
 	 * @return index
 	 */
-	protected int findClosest(Color c) {
+	protected int findClosest(final Color c) {
 		if (colorTab == null) return -1;
-		int r = c.getRed();
-		int g = c.getGreen();
-		int b = c.getBlue();
+		final int r = c.getRed();
+		final int g = c.getGreen();
+		final int b = c.getBlue();
 		int minpos = 0;
 		int dmin = 256 * 256 * 256;
-		int len = colorTab.length;
+		final int len = colorTab.length;
 		for (int i = 0; i < len; ) {
-			int dr = r - (colorTab[i++] & 0xff);
-			int dg = g - (colorTab[i++] & 0xff);
-			int db = b - (colorTab[i] & 0xff);
-			int d = dr * dr + dg * dg + db * db;
-			int index = i / 3;
+			final int dr = r - (colorTab[i++] & 0xff);
+			final int dg = g - (colorTab[i++] & 0xff);
+			final int db = b - (colorTab[i] & 0xff);
+			final int d = dr * dr + dg * dg + db * db;
+			final int index = i / 3;
 			if (usedEntry[index] && (d < dmin)) {
 				dmin = d;
 				minpos = index;
@@ -382,7 +382,7 @@ public class AnimatedGifEncoder {
 	 * @param c 颜色
 	 * @return 颜色是否存在
 	 */
-	boolean isColorUsed(Color c) {
+	boolean isColorUsed(final Color c) {
 		return findExact(c) != -1;
 	}
 
@@ -392,17 +392,17 @@ public class AnimatedGifEncoder {
 	 * @param c Color
 	 * @return index
 	 */
-	protected int findExact(Color c) {
+	protected int findExact(final Color c) {
 		if (colorTab == null) {
 			return -1;
 		}
 
-		int r = c.getRed();
-		int g = c.getGreen();
-		int b = c.getBlue();
-		int len = colorTab.length / 3;
+		final int r = c.getRed();
+		final int g = c.getGreen();
+		final int b = c.getBlue();
+		final int len = colorTab.length / 3;
 		for (int index = 0; index < len; ++index) {
-			int i = index * 3;
+			final int i = index * 3;
 			// If the entry is used in colorTab, then check if it is the same exact color we're looking for
 			if (usedEntry[index] && r == (colorTab[i] & 0xff) && g == (colorTab[i + 1] & 0xff) && b == (colorTab[i + 2] & 0xff)) {
 				return index;
@@ -415,16 +415,16 @@ public class AnimatedGifEncoder {
 	 * Extracts image pixels into byte array "pixels"
 	 */
 	protected void getImagePixels() {
-		int w = image.getWidth();
-		int h = image.getHeight();
-		int type = image.getType();
+		final int w = image.getWidth();
+		final int h = image.getHeight();
+		final int type = image.getType();
 		if ((w != width)
 				|| (h != height)
 				|| (type != BufferedImage.TYPE_3BYTE_BGR)) {
 			// create new image with right size/format
-			BufferedImage temp =
+			final BufferedImage temp =
 					new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
-			Graphics2D g = temp.createGraphics();
+			final Graphics2D g = temp.createGraphics();
 			g.setColor(background);
 			g.fillRect(0, 0, width, height);
 			g.drawImage(image, 0, 0, null);
@@ -442,7 +442,8 @@ public class AnimatedGifEncoder {
 		out.write(0x21); // extension introducer
 		out.write(0xf9); // GCE label
 		out.write(4); // data block size
-		int transp, disp;
+		final int transp;
+		int disp;
 		if (transparent == null) {
 			transp = 0;
 			disp = 0; // dispose = no action
@@ -537,7 +538,7 @@ public class AnimatedGifEncoder {
 	 */
 	protected void writePalette() throws IOException {
 		out.write(colorTab, 0, colorTab.length);
-		int n = (3 * 256) - colorTab.length;
+		final int n = (3 * 256) - colorTab.length;
 		for (int i = 0; i < n; i++) {
 			out.write(0);
 		}
@@ -549,7 +550,7 @@ public class AnimatedGifEncoder {
 	 * @throws IOException IO异常
 	 */
 	protected void writePixels() throws IOException {
-		LZWEncoder encoder = new LZWEncoder(width, height, indexedPixels, colorDepth);
+		final LZWEncoder encoder = new LZWEncoder(width, height, indexedPixels, colorDepth);
 		encoder.encode(out);
 	}
 
@@ -559,7 +560,7 @@ public class AnimatedGifEncoder {
 	 * @param value 16-bit value
 	 * @throws IOException IO异常
 	 */
-	protected void writeShort(int value) throws IOException {
+	protected void writeShort(final int value) throws IOException {
 		out.write(value & 0xff);
 		out.write((value >> 8) & 0xff);
 	}
@@ -570,7 +571,7 @@ public class AnimatedGifEncoder {
 	 * @param s String
 	 * @throws IOException IO异常
 	 */
-	protected void writeString(String s) throws IOException {
+	protected void writeString(final String s) throws IOException {
 		for (int i = 0; i < s.length(); i++) {
 			out.write((byte) s.charAt(i));
 		}

hutool-swing/src/main/java/cn/hutool/swing/img/gif/GifDecoder.java

@@ -107,7 +107,7 @@ public class GifDecoder {
 	protected int frameCount;
 
 	static class GifFrame {
-		public GifFrame(BufferedImage im, int del) {
+		public GifFrame(final BufferedImage im, final int del) {
 			image = im;
 			delay = del;
 		}
@@ -122,7 +122,7 @@ public class GifDecoder {
 	 * @param n int index of frame
 	 * @return delay in milliseconds
 	 */
-	public int getDelay(int n) {
+	public int getDelay(final int n) {
 		//
 		delay = -1;
 		if ((n >= 0) && (n < frameCount)) {
@@ -165,14 +165,14 @@ public class GifDecoder {
 	 */
 	protected void setPixels() {
 		// expose destination image's pixels as int array
-		int[] dest =
+		final int[] dest =
 				((DataBufferInt) image.getRaster().getDataBuffer()).getData();
 
 		// fill in starting image contents based on last image's dispose code
 		if (lastDispose > 0) {
 			if (lastDispose == 3) {
 				// use image before last
-				int n = frameCount - 2;
+				final int n = frameCount - 2;
 				if (n > 0) {
 					lastImage = getFrame(n - 1);
 				} else {
@@ -181,15 +181,15 @@ public class GifDecoder {
 			}
 
 			if (lastImage != null) {
-				int[] prev =
+				final int[] prev =
 						((DataBufferInt) lastImage.getRaster().getDataBuffer()).getData();
 				System.arraycopy(prev, 0, dest, 0, width * height);
 				// copy pixels
 
 				if (lastDispose == 2) {
 					// fill last image rect area with background color
-					Graphics2D g = image.createGraphics();
-					Color c;
+					final Graphics2D g = image.createGraphics();
+					final Color c;
 					if (transparency) {
 						c = new Color(0, 0, 0, 0);    // assume background is transparent
 					} else {
@@ -230,7 +230,7 @@ public class GifDecoder {
 			}
 			line += iy;
 			if (line < height) {
-				int k = line * width;
+				final int k = line * width;
 				int dx = k + ix; // start of line in dest
 				int dlim = dx + iw; // end of dest line
 				if ((k + width) < dlim) {
@@ -239,8 +239,8 @@ public class GifDecoder {
 				int sx = i * iw; // start of line in source
 				while (dx < dlim) {
 					// map color and insert in destination
-					int index = ((int) pixels[sx++]) & 0xff;
-					int c = act[index];
+					final int index = ((int) pixels[sx++]) & 0xff;
+					final int c = act[index];
 					if (c != 0) {
 						dest[dx] = c;
 					}
@@ -256,7 +256,7 @@ public class GifDecoder {
 	 * @param n frame
 	 * @return BufferedImage
 	 */
-	public BufferedImage getFrame(int n) {
+	public BufferedImage getFrame(final int n) {
 		BufferedImage im = null;
 		if ((n >= 0) && (n < frameCount)) {
 			im = frames.get(n).image;
@@ -279,7 +279,7 @@ public class GifDecoder {
 	 * @param is BufferedInputStream containing GIF file.
 	 * @return read status code (0 = no errors)
 	 */
-	public int read(BufferedInputStream is) {
+	public int read(final BufferedInputStream is) {
 		init();
 		if (is != null) {
 			in = is;
@@ -336,13 +336,13 @@ public class GifDecoder {
 			name = name.trim().toLowerCase();
 			if ((name.contains("file:")) ||
 					(name.indexOf(":/") > 0)) {
-				URL url = new URL(name);
+				final URL url = new URL(name);
 				in = new BufferedInputStream(url.openStream());
 			} else {
 				in = new BufferedInputStream(new FileInputStream(name));
 			}
 			status = read(in);
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			status = STATUS_OPEN_ERROR;
 		}
 
@@ -354,25 +354,25 @@ public class GifDecoder {
 	 * Adapted from John Cristy's ImageMagick.
 	 */
 	protected void decodeImageData() {
-		int NullCode = -1;
-		int npix = iw * ih;
-		int available,
-				clear,
-				code_mask,
-				code_size,
-				end_of_information,
-				in_code,
-				old_code,
-				bits,
-				code,
-				count,
-				i,
-				datum,
-				data_size,
-				first,
-				top,
-				bi,
-				pi;
+		final int NullCode = -1;
+		final int npix = iw * ih;
+		int available;
+		int clear;
+		int code_mask;
+		int code_size;
+		int end_of_information;
+		int in_code;
+		int old_code;
+		int bits;
+		int code;
+		int count;
+		int i;
+		int datum;
+		final int data_size;
+		int first;
+		int top;
+		int bi;
+		int pi;
 
 		if ((pixels == null) || (pixels.length < npix)) {
 			pixels = new byte[npix]; // allocate new pixel array
@@ -512,7 +512,7 @@ public class GifDecoder {
 		int curByte = 0;
 		try {
 			curByte = in.read();
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			status = STATUS_FORMAT_ERROR;
 		}
 		return curByte;
@@ -535,7 +535,7 @@ public class GifDecoder {
 						break;
 					n += count;
 				}
-			} catch (IOException e) {
+			} catch (final IOException e) {
 				//ignore
 			}
 
@@ -552,14 +552,14 @@ public class GifDecoder {
 	 * @param ncolors int number of colors to read
 	 * @return int array containing 256 colors (packed ARGB with full alpha)
 	 */
-	protected int[] readColorTable(int ncolors) {
-		int nbytes = 3 * ncolors;
+	protected int[] readColorTable(final int ncolors) {
+		final int nbytes = 3 * ncolors;
 		int[] tab = null;
-		byte[] c = new byte[nbytes];
+		final byte[] c = new byte[nbytes];
 		int n = 0;
 		try {
 			n = in.read(c);
-		} catch (IOException e) {
+		} catch (final IOException e) {
 			//ignore
 		}
 		if (n < nbytes) {
@@ -569,9 +569,9 @@ public class GifDecoder {
 			int i = 0;
 			int j = 0;
 			while (i < ncolors) {
-				int r = ((int) c[j++]) & 0xff;
-				int g = ((int) c[j++]) & 0xff;
-				int b = ((int) c[j++]) & 0xff;
+				final int r = ((int) c[j++]) & 0xff;
+				final int g = ((int) c[j++]) & 0xff;
+				final int b = ((int) c[j++]) & 0xff;
 				tab[i++] = 0xff000000 | (r << 16) | (g << 8) | b;
 			}
 		}
@@ -635,7 +635,7 @@ public class GifDecoder {
 	 */
 	protected void readGraphicControlExt() {
 		read(); // block size
-		int packed = read(); // packed fields
+		final int packed = read(); // packed fields
 		dispose = (packed & 0x1c) >> 2; // disposal method
 		if (dispose == 0) {
 			dispose = 1; // elect to keep old image if discretionary
@@ -675,7 +675,7 @@ public class GifDecoder {
 		iw = readShort();
 		ih = readShort();
 
-		int packed = read();
+		final int packed = read();
 		lctFlag = (packed & 0x80) != 0; // 1 - local color table flag
 		interlace = (packed & 0x40) != 0; // 2 - interlace flag
 		// 3 - sort flag
@@ -734,7 +734,7 @@ public class GifDecoder {
 		height = readShort();
 
 		// packed fields
-		int packed = read();
+		final int packed = read();
 		gctFlag = (packed & 0x80) != 0; // 1   : global color table flag
 		// 2-4 : color resolution
 		// 5   : gct sort flag
@@ -752,8 +752,8 @@ public class GifDecoder {
 			readBlock();
 			if (block[0] == 1) {
 				// loop count sub-block
-				int b1 = ((int) block[1]) & 0xff;
-				int b2 = ((int) block[2]) & 0xff;
+				final int b1 = ((int) block[1]) & 0xff;
+				final int b2 = ((int) block[2]) & 0xff;
 				loopCount = (b2 << 8) | b1;
 			}
 		} while ((blockSize > 0) && !err());

hutool-swing/src/main/java/cn/hutool/swing/img/gif/LZWEncoder.java

@@ -119,7 +119,7 @@ class LZWEncoder {
 	byte[] accum = new byte[256];
 
 	//----------------------------------------------------------------------------
-	LZWEncoder(int width, int height, byte[] pixels, int color_depth) {
+	LZWEncoder(final int width, final int height, final byte[] pixels, final int color_depth) {
 		imgW = width;
 		imgH = height;
 		pixAry = pixels;
@@ -128,7 +128,7 @@ class LZWEncoder {
 
 	// Add a character to the end of the current packet, and if it is 254
 	// characters, flush the packet to disk.
-	void char_out(byte c, OutputStream outs) throws IOException {
+	void char_out(final byte c, final OutputStream outs) throws IOException {
 		accum[a_count++] = c;
 		if (a_count >= 254)
 			flush_char(outs);
@@ -137,7 +137,7 @@ class LZWEncoder {
 	// Clear out the hash table
 
 	// table clear for block compress
-	void cl_block(OutputStream outs) throws IOException {
+	void cl_block(final OutputStream outs) throws IOException {
 		cl_hash(hsize);
 		free_ent = ClearCode + 2;
 		clear_flg = true;
@@ -146,18 +146,18 @@ class LZWEncoder {
 	}
 
 	// reset code table
-	void cl_hash(int hsize) {
+	void cl_hash(final int hsize) {
 		for (int i = 0; i < hsize; ++i)
 			htab[i] = -1;
 	}
 
-	void compress(int init_bits, OutputStream outs) throws IOException {
+	void compress(final int init_bits, final OutputStream outs) throws IOException {
 		int fcode;
 		int i /* = 0 */;
 		int c;
 		int ent;
 		int disp;
-		int hsize_reg;
+		final int hsize_reg;
 		int hshift;
 
 		// Set up the globals:  g_init_bits - initial number of bits
@@ -222,7 +222,7 @@ class LZWEncoder {
 	}
 
 	//----------------------------------------------------------------------------
-	void encode(OutputStream os) throws IOException {
+	void encode(final OutputStream os) throws IOException {
 		os.write(initCodeSize); // write "initial code size" byte
 
 		remaining = imgW * imgH; // reset navigation variables
@@ -234,7 +234,7 @@ class LZWEncoder {
 	}
 
 	// Flush the packet to disk, and reset the accumulator
-	void flush_char(OutputStream outs) throws IOException {
+	void flush_char(final OutputStream outs) throws IOException {
 		if (a_count > 0) {
 			outs.write(a_count);
 			outs.write(accum, 0, a_count);
@@ -242,7 +242,7 @@ class LZWEncoder {
 		}
 	}
 
-	final int MAXCODE(int n_bits) {
+	final int MAXCODE(final int n_bits) {
 		return (1 << n_bits) - 1;
 	}
 
@@ -255,12 +255,12 @@ class LZWEncoder {
 
 		--remaining;
 
-		byte pix = pixAry[curPixel++];
+		final byte pix = pixAry[curPixel++];
 
 		return pix & 0xff;
 	}
 
-	void output(int code, OutputStream outs) throws IOException {
+	void output(final int code, final OutputStream outs) throws IOException {
 		cur_accum &= masks[cur_bits];
 
 		if (cur_bits > 0)

hutool-swing/src/main/java/cn/hutool/swing/img/gif/NeuQuant.java

@@ -89,7 +89,7 @@ public class NeuQuant {
 
 	/* Initialise network in range (0,0,0) to (255,255,255) and set parameters
 	   ----------------------------------------------------------------------- */
-	public NeuQuant(byte[] thepic, int len, int sample) {
+	public NeuQuant(final byte[] thepic, final int len, final int sample) {
 
 		int i;
 		int[] p;
@@ -109,13 +109,13 @@ public class NeuQuant {
 	}
 
 	public byte[] colorMap() {
-		byte[] map = new byte[3 * NETSIZE];
-		int[] index = new int[NETSIZE];
+		final byte[] map = new byte[3 * NETSIZE];
+		final int[] index = new int[NETSIZE];
 		for (int i = 0; i < NETSIZE; i++)
 			index[network[i][3]] = i;
 		int k = 0;
 		for (int i = 0; i < NETSIZE; i++) {
-			int j = index[i];
+			final int j = index[i];
 			map[k++] = (byte) (network[j][0]);
 			map[k++] = (byte) (network[j][1]);
 			map[k++] = (byte) (network[j][2]);
@@ -181,9 +181,15 @@ public class NeuQuant {
 	public void learn() {
 
 		int i, j, b, g, r;
-		int radius, rad, alpha, step, delta, samplepixels;
-		byte[] p;
-		int pix, lim;
+		int radius;
+		int rad;
+		int alpha;
+		int step;
+		int delta;
+		final int samplepixels;
+		final byte[] p;
+		int pix;
+		final int lim;
 
 		if (lengthcount < MINPICTUREBYTES)
 			samplefac = 1;
@@ -252,7 +258,7 @@ public class NeuQuant {
 
 	/* Search for BGR values 0..255 (after net is unbiased) and return colour index
 	   ---------------------------------------------------------------------------- */
-	public int map(int b, int g, int r) {
+	public int map(final int b, final int g, final int r) {
 
 		int i, j, dist, a, bestd;
 		int[] p;
@@ -338,7 +344,7 @@ public class NeuQuant {
 
 	/* Move adjacent neurons by precomputed alpha*(1-((i-j)^2/[r]^2)) in radpower[|i-j|]
 	   --------------------------------------------------------------------------------- */
-	protected void alterneigh(int rad, int i, int b, int g, int r) {
+	protected void alterneigh(final int rad, final int i, final int b, final int g, final int r) {
 
 		int j, k, lo, hi, a, m;
 		int[] p;
@@ -361,7 +367,7 @@ public class NeuQuant {
 					p[0] -= (a * (p[0] - b)) / ALPHARADBIAS;
 					p[1] -= (a * (p[1] - g)) / ALPHARADBIAS;
 					p[2] -= (a * (p[2] - r)) / ALPHARADBIAS;
-				} catch (Exception ignored) {
+				} catch (final Exception ignored) {
 				} // prevents 1.3 miscompilation
 			}
 			if (k > lo) {
@@ -370,7 +376,7 @@ public class NeuQuant {
 					p[0] -= (a * (p[0] - b)) / ALPHARADBIAS;
 					p[1] -= (a * (p[1] - g)) / ALPHARADBIAS;
 					p[2] -= (a * (p[2] - r)) / ALPHARADBIAS;
-				} catch (Exception ignored) {
+				} catch (final Exception ignored) {
 				}
 			}
 		}
@@ -378,10 +384,10 @@ public class NeuQuant {
 
 	/* Move neuron i towards biased (b,g,r) by factor alpha
 	   ---------------------------------------------------- */
-	protected void altersingle(int alpha, int i, int b, int g, int r) {
+	protected void altersingle(final int alpha, final int i, final int b, final int g, final int r) {
 
 		/* alter hit neuron */
-		int[] n = network[i];
+		final int[] n = network[i];
 		n[0] -= (alpha * (n[0] - b)) / INITALPHA;
 		n[1] -= (alpha * (n[1] - g)) / INITALPHA;
 		n[2] -= (alpha * (n[2] - r)) / INITALPHA;
@@ -389,7 +395,7 @@ public class NeuQuant {
 
 	/* Search for biased BGR values
 	   ---------------------------- */
-	protected int contest(int b, int g, int r) {
+	protected int contest(final int b, final int g, final int r) {
 
 		/* finds closest neuron (min dist) and updates freq */
 		/* finds best neuron (min dist-bias) and returns position */

hutool-swing/src/test/java/cn/hutool/swing/ClipboardMonitorTest.java

@@ -12,14 +12,14 @@ public class ClipboardMonitorTest {
 	public void monitorTest() {
 		// 第一个监听
 		ClipboardUtil.listen((clipboard, contents) -> {
-			Object object = ClipboardUtil.getStr(contents);
+			final Object object = ClipboardUtil.getStr(contents);
 			Console.log("1# {}", object);
 			return contents;
 		}, false);
 
 		// 第二个监听
 		ClipboardUtil.listen((clipboard, contents) -> {
-			Object object = ClipboardUtil.getStr(contents);
+			final Object object = ClipboardUtil.getStr(contents);
 			Console.log("2# {}", object);
 			return contents;
 		});

hutool-swing/src/test/java/cn/hutool/swing/ClipboardUtilTest.java

@@ -7,7 +7,7 @@ import cn.hutool.core.swing.clipboard.ClipboardUtil;
 
 /**
  * 剪贴板工具类单元测试
- * 
+ *
  * @author looly
  *
  */
@@ -18,9 +18,9 @@ public class ClipboardUtilTest {
 		try {
 			ClipboardUtil.setStr("test");
 
-			String test = ClipboardUtil.getStr();
+			final String test = ClipboardUtil.getStr();
 			Assert.assertEquals("test", test);
-		} catch (java.awt.HeadlessException e) {
+		} catch (final java.awt.HeadlessException e) {
 			// 忽略 No X11 DISPLAY variable was set, but this program performed an operation which requires it.
 			// ignore
 		}

hutool-swing/src/test/java/cn/hutool/swing/captcha/CaptchaTest.java

@@ -18,7 +18,7 @@ public class CaptchaTest {
 	@Test
 	public void lineCaptchaTest1() {
 		// 定义图形验证码的长和宽
-		LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(200, 100);
+		final LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(200, 100);
 		Assert.assertNotNull(lineCaptcha.getCode());
 		Assert.assertTrue(lineCaptcha.verify(lineCaptcha.getCode()));
 	}
@@ -27,7 +27,7 @@ public class CaptchaTest {
 	@Ignore
 	public void lineCaptchaTest3() {
 		// 定义图形验证码的长和宽
-		LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(200, 70, 4, 15);
+		final LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(200, 70, 4, 15);
 		lineCaptcha.setBackground(Color.yellow);
 		lineCaptcha.write("f:/test/captcha/tellow.png");
 	}
@@ -36,7 +36,7 @@ public class CaptchaTest {
 	@Ignore
 	public void lineCaptchaWithMathTest() {
 		// 定义图形验证码的长和宽
-		LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(200, 80);
+		final LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(200, 80);
 		lineCaptcha.setGenerator(new MathGenerator());
 		lineCaptcha.setTextAlpha(0.8f);
 		lineCaptcha.write("f:/captcha/math.png");
@@ -47,7 +47,7 @@ public class CaptchaTest {
 	public void lineCaptchaTest2() {
 
 		// 定义图形验证码的长和宽
-		LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(200, 100);
+		final LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(200, 100);
 		// LineCaptcha lineCaptcha = new LineCaptcha(200, 100, 4, 150);
 		// 图形验证码写出，可以写出到文件，也可以写出到流
 		lineCaptcha.write("f:/captcha/line.png");
@@ -67,7 +67,7 @@ public class CaptchaTest {
 	public void circleCaptchaTest() {
 
 		// 定义图形验证码的长和宽
-		CircleCaptcha captcha = CaptchaUtil.createCircleCaptcha(200, 100, 4, 20);
+		final CircleCaptcha captcha = CaptchaUtil.createCircleCaptcha(200, 100, 4, 20);
 		// CircleCaptcha captcha = new CircleCaptcha(200, 100, 4, 20);
 		// 图形验证码写出，可以写出到文件，也可以写出到流
 		captcha.write("f:/captcha/circle.png");
@@ -80,7 +80,7 @@ public class CaptchaTest {
 	public void shearCaptchaTest() {
 
 		// 定义图形验证码的长和宽
-		ShearCaptcha captcha = CaptchaUtil.createShearCaptcha(203, 100, 4, 4);
+		final ShearCaptcha captcha = CaptchaUtil.createShearCaptcha(203, 100, 4, 4);
 		// ShearCaptcha captcha = new ShearCaptcha(200, 100, 4, 4);
 		// 图形验证码写出，可以写出到文件，也可以写出到流
 		captcha.write("f:/captcha/shear.png");
@@ -93,7 +93,7 @@ public class CaptchaTest {
 	public void shearCaptchaTest2() {
 
 		// 定义图形验证码的长和宽
-		ShearCaptcha captcha = new ShearCaptcha(200, 100, 4, 4);
+		final ShearCaptcha captcha = new ShearCaptcha(200, 100, 4, 4);
 		// 图形验证码写出，可以写出到文件，也可以写出到流
 		captcha.write("d:/test/shear.png");
 		// 验证图形验证码的有效性，返回boolean值
@@ -104,7 +104,7 @@ public class CaptchaTest {
 	@Ignore
 	public void ShearCaptchaWithMathTest() {
 		// 定义图形验证码的长和宽
-		ShearCaptcha captcha = CaptchaUtil.createShearCaptcha(200, 45, 4, 4);
+		final ShearCaptcha captcha = CaptchaUtil.createShearCaptcha(200, 45, 4, 4);
 		captcha.setGenerator(new MathGenerator());
 		// ShearCaptcha captcha = new ShearCaptcha(200, 100, 4, 4);
 		// 图形验证码写出，可以写出到文件，也可以写出到流
@@ -116,7 +116,7 @@ public class CaptchaTest {
 	@Test
 	@Ignore
 	public void GifCaptchaTest() {
-		GifCaptcha captcha = CaptchaUtil.createGifCaptcha(200, 100, 4);
+		final GifCaptcha captcha = CaptchaUtil.createGifCaptcha(200, 100, 4);
 		captcha.write("d:/test/gif_captcha.gif");
 		assert captcha.verify(captcha.getCode());
 	}
@@ -124,7 +124,7 @@ public class CaptchaTest {
 	@Test
 	@Ignore
 	public void bgTest(){
-		LineCaptcha captcha = CaptchaUtil.createLineCaptcha(200, 100, 4, 1);
+		final LineCaptcha captcha = CaptchaUtil.createLineCaptcha(200, 100, 4, 1);
 		captcha.setBackground(Color.WHITE);
 		captcha.write("d:/test/test.jpg");
 	}

hutool-swing/src/test/java/cn/hutool/swing/img/ImgTest.java

@@ -89,11 +89,11 @@ public class ImgTest {
 	@Test
 	@Ignore
 	public void scaleTest() {
-		String downloadFile = "d:/test/1435859438434136064.JPG";
-		File file = FileUtil.file(downloadFile);
-		File fileScale = FileUtil.file(downloadFile + ".scale." + FileTypeUtil.getType(file));
+		final String downloadFile = "d:/test/1435859438434136064.JPG";
+		final File file = FileUtil.file(downloadFile);
+		final File fileScale = FileUtil.file(downloadFile + ".scale." + FileTypeUtil.getType(file));
 
-		Image img = ImgUtil.getImage(URLUtil.getURL(file));
+		final Image img = ImgUtil.getImage(URLUtil.getURL(file));
 		ImgUtil.scale(img, fileScale, 0.8f);
 	}
 }

hutool-swing/src/test/java/cn/hutool/swing/img/ImgUtilTest.java

@@ -54,7 +54,7 @@ public class ImgUtilTest {
 	@Test
 	@Ignore
 	public void rotateTest() throws IOException {
-		Image image = ImgUtil.rotate(ImageIO.read(FileUtil.file("e:/pic/366466.jpg")), 180);
+		final Image image = ImgUtil.rotate(ImageIO.read(FileUtil.file("e:/pic/366466.jpg")), 180);
 		ImgUtil.write(image, FileUtil.file("e:/pic/result.png"));
 	}
 
@@ -115,7 +115,7 @@ public class ImgUtilTest {
 	@Test
 	@Ignore
 	public void copyTest() {
-		BufferedImage image = ImgUtil.copyImage(ImgUtil.read("f:/pic/test.png"), BufferedImage.TYPE_INT_RGB);
+		final BufferedImage image = ImgUtil.copyImage(ImgUtil.read("f:/pic/test.png"), BufferedImage.TYPE_INT_RGB);
 		ImgUtil.write(image, FileUtil.file("f:/pic/test_dest.jpg"));
 	}
 
@@ -142,8 +142,8 @@ public class ImgUtilTest {
 
 	@Test
 	public void getMainColor() throws MalformedURLException {
-		BufferedImage read = ImgUtil.read(new URL("https://pic2.zhimg.com/v2-94f5552f2b142ff575306850c5bab65d_b.png"));
-		String mainColor = ImgUtil.getMainColor(read, new int[]{64,84,116});
+		final BufferedImage read = ImgUtil.read(new URL("https://pic2.zhimg.com/v2-94f5552f2b142ff575306850c5bab65d_b.png"));
+		final String mainColor = ImgUtil.getMainColor(read, new int[]{64,84,116});
 		System.out.println(mainColor);
 	}