client.java

使用java语言写的聊天工具

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

import javax.swing.JOptionPane;
/*
 * 该类实现创建一个客户端
 */
public class Client extends Thread 
{
    Listener listener=null;
    Socket client=null;
    List onLineUsersList=null,chatContentList=null;
    String word="";
    boolean isClosed=false;
    public Client(String ip,int port,List onLineUsersList,List chatContentList) throws UnknownHostException,IOException
    {
        this.client=new Socket(ip,port);
        this.onLineUsersList=onLineUsersList;
        this.chatContentList=chatContentList;
        this.start();
    }

    public void run()
    {
        BufferedReader br=null;
        PrintStream ps=null;
        try 
        {
            br = new BufferedReader(new InputStreamReader(client.getInputStream()));
            ps=new PrintStream(client.getOutputStream(),true);
            //建立对服务器发送来的信息进行监听的线程
            listener=new Listener(br,this.onLineUsersList,this.chatContentList);
            //循环发送消息给服务器
            while(!isClosed)
            {
                if(this.word.length()>0)
                {
                    ps.println(this.word);
                    this.word="";
                }
                else
                {
                    sleep(100);
                }
            }
            //关闭回收操作
            listener.destroy();
            client.close();
        } 
        catch (Exception ex) 
        {
            JOptionPane.showMessageDialog(null,"对不起，有错误，请重启程序。","错误",JOptionPane.INFORMATION_MESSAGE);
        }
    }
    //提供给可视界面一个发消息的入口
    public void send(String s)
    {
        this.word=s;
    }
    public void destroy()  
    {
        this.onLineUsersList.removeAll();
        this.chatContentList.removeAll();
        this.isClosed=true;
    }
    public Listener getListener()
    {
        return this.listener;
    }
}