定时器与回调

测试类

import java.awt.event.ActionListener;import javax.swing.JOptionPane;import javax.swing.Timer;public class Test {    public static void main(String[] args) {        ActionListener listen=new TimeToPrint();        Timer t=new Timer(10,listen);        t.start();        JOptionPane.showMessageDialog(null, "Quit progran?");        System.exit(0);    }}

实现接口

import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.util.Date;public class TimeToPrint implements ActionListener{    @Override    public void actionPerformed(ActionEvent e) {        // TODO Auto-generated method stub        Date now=new Date();         System.out.println("Now the time is "+now);         Toolkit.getDefaultToolkit().beep();    }}