fix code

hutool-socket/src/main/java/cn/hutool/socket/SocketConfig.java

@@ -1,8 +1,9 @@
 package cn.hutool.socket;
 
-import java.io.Serializable;
-
 import cn.hutool.core.io.IoUtil;
+import cn.hutool.core.util.RuntimeUtil;
+
+import java.io.Serializable;
 
 /**
  * Socket通讯配置
@@ -14,7 +15,7 @@ public class SocketConfig implements Serializable{
 	private static final long serialVersionUID = 1L;
 
 	/** CPU核心数 */
-	private static int CPU_COUNT = Runtime.getRuntime().availableProcessors();
+	private static final int CPU_COUNT = RuntimeUtil.getProcessorCount();
 
 	/** 共享线程池大小，此线程池用于接收和处理用户连接 */
 	private int threadPoolSize = CPU_COUNT;

hutool-socket/src/main/java/cn/hutool/socket/nio/NioServer.java

@@ -1,5 +1,8 @@
 package cn.hutool.socket.nio;
 
+import cn.hutool.core.io.IORuntimeException;
+import cn.hutool.core.io.IoUtil;
+
 import java.io.Closeable;
 import java.io.IOException;
 import java.net.InetSocketAddress;
@@ -11,9 +14,6 @@ import java.nio.channels.ServerSocketChannel;
 import java.nio.channels.SocketChannel;
 import java.util.Iterator;
 
-import cn.hutool.core.io.IORuntimeException;
-import cn.hutool.core.io.IoUtil;
-
 /**
  * 基于NIO的Socket服务端实现
  * 
@@ -130,7 +130,7 @@ public abstract class NioServer implements Closeable {
 	}
 
 	@Override
-	public void close() throws IOException {
+	public void close() {
 		IoUtil.close(this.selector);
 		IoUtil.close(this.serverSocketChannel);
 	}
@@ -166,6 +166,7 @@ public abstract class NioServer implements Closeable {
 		try {
 			channel.configureBlocking(false);
 			// 注册通道
+			//noinspection MagicConstant
 			channel.register(selector, ops.getValue());
 		} catch (IOException e) {
 			throw new IORuntimeException(e);

hutool-socket/src/main/java/cn/hutool/socket/nio/Operation.java

@@ -18,7 +18,7 @@ public enum Operation {
 	/** 接受连接操作 */
 	ACCEPT(SelectionKey.OP_ACCEPT);
 
-	private int value;
+	private final int value;
 
 	/**
 	 * 构造