java socket示例

import java.net.*;
  import java.io.*;

  public class MultiUser extends Thread{
  private Socket client;

  public MultiUser(Socket c){
  this.client=c;
  }

  public void run(){
  try{
   BufferedReader in=new BufferedReader(new InputStreamReader(client.getInputStream()));
   PrintWriter ut=new PrintWriter(client.getOutputStream());
   //Mutil User but can't parallel
   while(true){
    String str=in.readLine();
    System.out.println(str);
    out.println("has receive....");
    out.flush();
    if(str.equals("end"))
     break;
   }
   client.close();
  }catch(IOException ex){
  }finally{
  }
  }

  public static void main(String[] args)throws IOException{
  ServerSocket server=new ServerSocket(5678);
  while(true){
  //transfer location change Single User or Multi User
  MultiUser mu=new MultiUser(server.accept());
  mu.start();
  }
  }
  }