chatroom.java

一个简单聊天室实现,不错的哦

import java.net.*;
import java.io.*;
import java.awt.*;import java.awt.event.*;
import java.applet.*;
public class ChatRoom extends Applet implements Runnable,ActionListener
{ Button button;TextField text1;TextArea text2;
  Socket socket;
  DataInputStream in;
  DataOutputStream out;
  Thread thread; 
 public void init()
 {setBackground(new Color(113,163,139));
  setLayout(new BorderLayout());
  button=new Button("send");text1=new TextField(12);
  text2=new TextArea();
  Panel p=new Panel();p.add(text1);p.add(button);
  add("Center",text2);add("South",p);
  button.addActionListener(this);
 }
 public void start()
 { try
   {socket = new Socket(this.getCodeBase().getHost(), 4331);
   in = new DataInputStream(socket.getInputStream());
   out = new DataOutputStream(socket.getOutputStream());
   } 
   catch (IOException e){}
  if (thread == null)
  {thread = new Thread(this);
  thread.setPriority(Thread.MIN_PRIORITY);
  thread.start();
  }
 }
 public void run()
  {String s1=null;
    while(true)
     { try{s1=in.readUTF();// 通过使用in读取服务器放入"线路"里的信息
          }
       catch (IOException e) {}
       if(s1.equals("bye"))
        {try{socket.close();break;}
         catch (IOException e) {}   
        }
       text2.append(s1+"\n");
     }
   }
  public void actionPerformed(ActionEvent e)
  {if (e.getSource()==button)
     { String s=text1.getText();
       if(s!=null)		      
        { try{out.writeUTF(s);}
          catch(IOException e1){} 
        }               
       else
        { try{out.writeUTF("请说话");}
          catch(IOException e1){} 
        }
      }
  }
}