java.net.BindException: Address already in use: JVM_Bind 解决方法

java.net.BindException: Address already in use: JVM_Bind
at java.net.DualStackPlainSocketImpl.bind0(Native Method)
at java.net.DualStackPlainSocketImpl.socketBind(DualStackPlainSocketImpl.java:106)
at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387)
at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:190)
at java.net.ServerSocket.bind(ServerSocket.java:375)
at java.net.ServerSocket.<init>(ServerSocket.java:237)
at java.net.ServerSocket.<init>(ServerSocket.java:128)
at practice9.Server.main(Server.java:19)
Exception in thread "Thread-0" java.lang.NullPointerException
at practice9.Server.lambda$0(Server.java:29)

at java.lang.Thread.run(Thread.java:748)

问题:现后启动服务端和客户端并进行通讯,发现没有什么问题,可是当我关闭之后想重新打开时发生了错误,

这个时候有一个粗笨的方案,就是重启eclipse,但这样真的不太好啊..------>>

来源:用ServerScoket进行服务端和客户端通讯的时候出现的----->>

错误名称:地址(端口)已经在使用------>>

分析:先看我的关键代码------->>

public class Server {
	
	private static ServerSocket ss;
	private static Socket so;
	private static DataInputStream dis;
	private static DataOutputStream dos;
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		try {
			ss = new ServerSocket(1000);
			so = ss.accept();
			System.out.println("Conneted successfully");
			dis = new DataInputStream(so.getInputStream());
		} catch (IOException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			}
		new Thread(()->{
			try {
				dos = new DataOutputStream(so.getOutputStream());
			} catch (IOException e2) {
				// TODO Auto-generated catch block
				e2.printStackTrace();
			}
			while(true) {
				try {
					String str = dis.readUTF();
					str = str.toUpperCase();
					dos.writeUTF(str);
				} catch (IOException e) {
					// TODO Auto-generated catch block
					try {
						dis.close();
					} catch (IOException e1) {
						// TODO Auto-generated catch block
						e1.printStackTrace();
					}
				}
				
			}
			
		}).start();
	}

首先我猜测是不是我里面有一个线程在程序关闭的时候没有停止------??

于是我把线程注释掉,重启,还是有问题,原假设排除-------->>

然后看到我前面有一个ServerSocket时static 的,难道就是因为时静态的------??

于是把他改一下-------->>

public class Server {
	
//	private static ServerSocket ss;
	private static Socket so;
	private static DataInputStream dis;
	private static DataOutputStream dos;
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		try {
			ServerSocket ss = new ServerSocket(1000);
			so = ss.accept();
			System.out.println("Conneted successfully");
			dis = new DataInputStream(so.getInputStream());
		} catch (IOException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
			}
		new Thread(()->{
			try {
				dos = new DataOutputStream(so.getOutputStream());
			} catch (IOException e2) {
				// TODO Auto-generated catch block
				e2.printStackTrace();
			}
			while(true) {
				try {
					String str = dis.readUTF();
					str = str.toUpperCase();
					dos.writeUTF(str);
				} catch (IOException e) {
					// TODO Auto-generated catch block
					try {
						dis.close();
					} catch (IOException e1) {
						// TODO Auto-generated catch block
						e1.printStackTrace();
					}
				}
				
			}
			
		}).start();
	}

重启,OK问题解决---->>

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