Demonstrating the AncestorListener : Various Event Listener « Swing JFC « Java

Demonstrating the AncestorListener

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Timer;
import java.util.TimerTask;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.event.AncestorEvent;
import javax.swing.event.AncestorListener;

public class AncestorTest {
  public static void main(String args[]) {
    final JFrame frame = new JFrame();
    Container contentPane = frame.getContentPane();
    JButton b = new JButton("Hide for 5");
    ActionListener action = new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        TimerTask task = new TimerTask() {
          public void run() {
        Timer timer = new Timer();
        timer.schedule(task, 5000);
    AncestorListener ancestor = new AncestorListener() {
      public void ancestorAdded(AncestorEvent e) {

      public void ancestorMoved(AncestorEvent e) {

      public void ancestorRemoved(AncestorEvent e) {

      private void dumpInfo(AncestorEvent e) {
        System.out.println("\tAncestor: " + name(e.getAncestor()));
        System.out.println("\tAncestorParent: "
            + name(e.getAncestorParent()));
        System.out.println("\tComponent: " + name(e.getComponent()));

      private String name(Container c) {
        return (c == null) ? null : c.getName();
    contentPane.add(b, BorderLayout.NORTH);
    frame.setSize(300, 200);;


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