btnapplet.java

针对越来越多的用户喜欢JAVA

import  java.applet.Applet;
import  java.awt.*;
import  java.awt.event.*;
public  class BtnApplet extends Applet  implements  ActionListener
{
    Button  btn;
    Label l1;
    public  void  init()
    {
      l1=new Label("你好");
      btn = new  Button( "单击" );
      add(l1);
      add(btn);
      btn.addActionListener(this);
    }
    public  void  actionPerformed(ActionEvent  e)
    {
       if ( e.getActionCommand().equals("单击") )
       if(l1.getText()=="你好")
         l1.setText("OK");
       else
         l1.setText("你好");
    }
}