Java 使用接口实现回调模式

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import java.awt.event.ActionEvent;

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import java.awt.event.ActionListener;

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import javax.swing.JOptionPane;

/*

时 代 J a v a

*/

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import javax.swing.Timer;

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public class TickTock {

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  public static void main(String[] args) {

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

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    t.start();

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    // display a message box to prevent the program from ending immediately

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    JOptionPane.showMessageDialog(null, "Click OK to exit program");

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  }/*来 自 时   代    Java - nowjava.com*/

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}

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class Ticker implements ActionListener {

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  private boolean tick = true;

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  public void actionPerformed(ActionEvent event) {

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    if (tick) {

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