package diliuzhang;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.util.Date;import java.util.Timer;import javax.swing.JOptionPane;public class InnerClassTest { public static void main(String[] args) { TalkingClock clock =new TalkingClock(1000,true); clock.start(); JOptionPane.showMessageDialog(null,"Quit program?"); System.exit(0); }}class TalkingClock{ private int interval; private boolean beep; public TalkingClock(int interval,boolean beep) { this.interval=interval; this.beep=beep; } public void start() { ActionListener listener=new TimerPrinter(); //構造一個定時器 每個xx毫秒通知 listener一次 Timer t=new Timer(interval,listener); //啟動 t.start(); } public class TimerPrinter implements ActionListener{ public void actionPerformed(ActionEvent event) { System.out.println("At the tone,the time is"+new Date()); if(beep)Toolkit.getDefaultToolkit().beep(); } } }