Exception in thread "main" java.net.BindException: Address already in use: JVM_Bind

 1 import java.io.PrintStream;
 2 import java.net.Socket;
 3 import java.net.ServerSocket;
 4 import java.util.Scanner;
 5 
 6 public class Server
 7 {
 8     public static void main(String[] args)
 9         throws Exception
10     {
11         ServerSocket ss = new ServerSocket(30000);
12         Socket socket = ss.accept();
13         PrintStream ps = new PrintStream(socket.getOutputStream());
14         ps.println("服务器的第一行数据");
15         ps.println("服务器的第二行数据");
16         // 关闭socket的输出流，表明输出数据已经结束
17         socket.shutdownOutput();
18         // 下面语句将输出false，表明socket还未关闭。
19         System.out.println(socket.isClosed());
20         Scanner scan = new Scanner(socket.getInputStream());
21         while (scan.hasNextLine())
22         {
23             System.out.println(scan.nextLine());
24         }
25         scan.close();
26         socket.close();
27         ss.close();
28     }
29 }