fix code

hutool-json/src/main/java/cn/hutool/json/JSONNull.java

@@ -25,16 +25,12 @@ public class JSONNull implements Serializable{
 	 * @param object An object to test for nullness.
 	 * @return true if the object parameter is the JSONObject.NULL object or null.
 	 */
+	@SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
 	@Override
 	public boolean equals(Object object) {
-		return object == null || (object instanceof JSONNull && object == this);
+		return object == null || (object == this);
 	}
 	
-	@Override
-	public int hashCode() {
-		return super.hashCode();
-	}
-
 	/**
 	 * Get the "null" string value.
 	 *获得“null”字符串

hutool-json/src/main/java/cn/hutool/json/JSONTokener.java

@@ -40,7 +40,7 @@ public class JSONTokener {
 	/**
 	 * 源
 	 */
-	private Reader reader;
+	private final Reader reader;
 
 	/**
 	 * JSON配置

hutool-json/src/test/java/cn/hutool/json/JSONArrayTest.java

@@ -1,14 +1,5 @@
 package cn.hutool.json;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-import org.junit.Assert;
-import org.junit.Ignore;
-import org.junit.Test;
-
 import cn.hutool.core.collection.CollUtil;
 import cn.hutool.core.io.FileUtil;
 import cn.hutool.core.lang.Console;
@@ -17,6 +8,14 @@ import cn.hutool.core.util.CharsetUtil;
 import cn.hutool.json.test.bean.Exam;
 import cn.hutool.json.test.bean.JsonNode;
 import cn.hutool.json.test.bean.KeyBean;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
 /**
  * JSONArray单元测试
@@ -121,6 +120,7 @@ public class JSONArrayTest {
 		String jsonStr = FileUtil.readString("exam_test.json", CharsetUtil.CHARSET_UTF_8);
 		JSONArray array = JSONUtil.parseArray(jsonStr);
 
+		//noinspection SuspiciousToArrayCall
 		Exam[] list = array.toArray(new Exam[0]);
 		Assert.assertNotEquals(0, list.length);
 		Assert.assertEquals(Exam.class, list[0].getClass());

hutool-json/src/test/java/cn/hutool/json/test/bean/ResultDto.java

@@ -74,7 +74,7 @@ public class ResultDto<T> implements Serializable {
 	 * @param message the message
 	 * @param result the result
 	 */
-	ResultDto(int code, String message, T result) {
+	public ResultDto(int code, String message, T result) {
 		super();
 		this.code(code).message(message).result(result);
 	}