renovate.java

java编写聊天室

import java.net.*;
import java.util.StringTokenizer;
import java.io.*;

public class Renovate extends Thread{
	ServerThread sThread;
	ClientThread cThread;
	public static int UserNumber=0;
	
	public Renovate(ServerThread sThread){
		this.sThread=sThread;
	}
	
	public void run(){
		while(true){
			try
			{
				Thread.sleep(2000);//每2秒刷新客户端用户名列表框一次
			}
			catch(InterruptedException e)
			{
				
			}
			synchronized(sThread.username)//刷新客户端用户列表
			{
				//System.out.println("这是用户列表框");
				
				//if(sThread.username.isEmpty()) continue;
				//else
				//{
					if(UserNumber==sThread.username.size())
					{
						continue;
					}
					else
					{
						UserNumber=sThread.username.size();
						StringBuffer people=new StringBuffer("PEOPLE:");
						if(sThread.username.size()!=0)
						{
							for(int j=0;j<sThread.username.size();j++){
								people.append((String)sThread.username.elementAt(j)+":");
							}
							for(int i=0;i<sThread.Clients.size();i++){
								cThread=(ClientThread)sThread.Clients.elementAt(i);
								cThread.write.println(people);
							}	
						}
					}
				//} 
					
				
			}
		}
	}

}