在方法中创建一个匿名类

import java.awt.event.ActionEvent;
/**
nowjava.com 提供 
**/

import java.awt.event.ActionListener;


import javax.swing.JOptionPane;

import javax.swing.Timer;


public class Main {


  public static void main(String[] args) {

    String tickMessage = "Tick...";

    String tockMessage = "Tock...";

    Timer t = new Timer(1000, new ActionListener() {

      private boolean tick = true;


      public void actionPerformed(ActionEvent event) {

        if (tick) {

          System.out.println(tickMessage);

        } else {

          System.out.println(tockMessage);
          /*来自 
           nowjava.com - 时  代  Java*/

        }

        tick = !tick;

      }

    });


    t.start();