example19_6.java

里面5个JAVA小程序

import java.applet.*;import java.awt.*;
import java.awt.event.*;
public class Example19_6 extends Applet implements ActionListener
{  Toolkit toolkit;Button button; 
   public void init()
   {  toolkit=getToolkit();//获得一个工具包对象 
      button=new  Button("确定");add(button);
      button.addActionListener(this); 
   }
   public void actionPerformed(ActionEvent e)
   {  if(e.getSource()==button)
       {  for(int i=0;i<=9;i++)
             {  toolkit.beep();
                try {  Thread.sleep(500);
                    }      //每隔半秒钟发出嘟声
               catch(InterruptedException e1){}
             }
       }
   }
}