login.java

这是我们课程设计的时候做的聊天程序

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

public class Login implements ActionListener{
        private Frame f;
        private TextField tf;
        private Label l;
        private String tfContent="";
        public Login(){
            f = new Frame("欢迎登陆");
            l = new Label("请输入用户名");
            tf = new TextField(20);
            f.setLayout(new FlowLayout());
            f.add(l);
            f.add(tf);
           // f.setSize(20,100);
                   f.pack();
                f.show();
                tf.addActionListener(this);
                f.addWindowListener(new WindowAdapter(){

                        public void windowClosing(WindowEvent e){
                                System.exit(0);
                        }

                        });


        }
        public void actionPerformed(ActionEvent e){
                System.out.println ("ft clicked");
                tfContent = tf.getText();
                ClientFrame cf = new ClientFrame(tfContent);
                
                f.dispose();
       }
       public static void main(String[] args){
           new Login();
       }
}
class ClientFrame extends Thread implements ActionListener{

        private Frame f;
        private TextField tf;
        private Button btn;
        TextArea ta;
        private Panel pup;
        
        String data;
        BufferedReader InputS;
        PrintStream OutputS;
        String name;


        ClientFrame(String str){
          name = str;	
          Socket client;
          try {
            client = new Socket("localhost",6000);
            InputS = new BufferedReader(new InputStreamReader(client.getInputStream()));
            OutputS = new PrintStream(client.getOutputStream(),true);
          }
          catch (Exception ex) {
            ex.printStackTrace();
          }
		  OutputS.println("欢迎" + name + "光临");
          
          f = new Frame("客户端");
          tf = new TextField(30);
          tf.addActionListener(this);
          
          
          btn = new Button("发送");
          ta = new TextArea();
          pup = new Panel();
          f.setLayout(new BorderLayout());
          f.add(pup,BorderLayout.NORTH);
          pup.add(tf);
          pup.add(btn);
          f.add(ta);
          
          f.pack();
          f.setSize(400,300);
          f.addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e){
              OutputS.println(name + "已经离开");
              System.exit(0);
            }});

          btn.addActionListener(this);
          f.show();
          this.start();
          
		
 		}
 		public  void run(){
 			try {
 				
 				while(true){
 					System.out.println ("刷屏....");
 					
 					OutputS.println("\u0001");
 					ta.setText(InputS.readLine().replaceAll("\u0001","\n"));
 					Thread.sleep(1000);
 				}
 			
			 }
			 catch (Exception ex) {
			 	ex.printStackTrace();
			 }
 		
 	
 	
 	
	    }

 public void actionPerformed(ActionEvent e){
   String cmd = e.getActionCommand();
   if (cmd.equals("发送")){
     System.out.println ("发送 clicked");
     data = tf.getText();
     try {

       OutputS.println(name + "说:" + data);

      ta.setText(InputS.readLine().replaceAll("\u0001","\n"));


     }
     catch (Exception ex) {
       ex.printStackTrace();
     }
     tf.setText("");
   }
   else{
   	     System.out.println ("发送 clicked");
     data = tf.getText();
     try {

       OutputS.println(name + "说:" + data);

      ta.setText(InputS.readLine().replaceAll("\u0001","\n"));


     }
     catch (Exception ex) {
       ex.printStackTrace();
     }
     tf.setText("");
   }
   

 }
}