帮忙找一下有关问题所在

帮忙找一下问题所在.
客户端:
package   src;
import   java.net.*;
import   java.io.*;

public   class   TCPClient   {
public   static   void   main(String[]   args)   throws   Exception{
Socket   s=new   Socket( "localhost ",8080);
PrintWriter   out=new   PrintWriter(s.getOutputStream());
BufferedReader   in=new   BufferedReader(
new   InputStreamReader(s.getInputStream()));

out.println(args[0]);
out.flush();

System.out.println(in.readLine());
System.out.println(in.readLine());

s.close();
}

}
服务器端:
import   java.net.*;
import   java.io.*;

public   class   TCPServer   {

public   static   void   main(String[]   args)   throws   Exception{
ServerSocket   ss=new   ServerSocket(8080);
int   id=0;
while(true){
Socket   s=new   Socket();
s=ss.accept();
id++;
new   MyThread(id,s).start();
}
}
}

class   MyThread   extends   Thread{
int   id;
Socket   s;
BufferedReader   br;
PrintWriter   pw;

public   MyThread(int   id,Socket   s){
super();
this.id=id;
this.s=s;
}

public   void   run(){
try{
br=new   BufferedReader(new   InputStreamReader(s.getInputStream()));
pw=new   PrintWriter(s.getOutputStream());
String   str=br.readLine();
str=str.toUpperCase();
pw.println(str);
pw.println( "you   are   "+id+ "   client ");
pw.flush();
s.close();
}catch(IOException   ie){
ie.printStackTrace();
}
}

}
编译出现的异常:
Exception   in   thread   "main "   java.net.BindException:   Address   already   in   use:   JVM_Bind
at   java.net.PlainSocketImpl.socketBind(Native   Method)
at   java.net.PlainSocketImpl.bind(PlainSocketImpl.java:359)
at   java.net.ServerSocket.bind(ServerSocket.java:319)
at   java.net.ServerSocket. <init> (ServerSocket.java:185)
at   java.net.ServerSocket. <init> (ServerSocket.java:97)
at   src.TCPServer.main(TCPServer.java:7)
希望帮忙找一下问题,谢谢.

------解决方案--------------------
Socket s=new Socket( "localhost ",8080);

端口被占用,换个端口
------解决方案--------------------
JVM_Bind, bind是什么意思？

一般就是端口被占用