内部接口示例，用于实现接口

import java.awt.event.*;

import javax.swing.*;//N o w J a v a . c o m - 时代Java 提 供


public class TickTockInner

{

  private static String tickMessage = "Tick...";

  private static String tockMessage = "Tock...";


  public static void main(String[] args)

  {

    TickTockInner t = new TickTockInner();

    t.go();

  }


  private void go()

  {

    Timer t = new Timer(1000, new Ticker());

    t.start();
/** 来 自 时代Java - nowjava.com**/

    JOptionPane.showMessageDialog(null,

      "Click OK to exit program");

    System.exit(0);

  }


  static class Ticker implements ActionListener

  {

    private boolean tick = true;


    public void actionPerformed(ActionEvent event)