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import javax.swing.JFrame;
import javax.swing.event.AncestorEvent;
import javax.swing.event.AncestorListener;
public class AncestorSampler {
public static void main (String args[]) {
JFrame f = new JFrame("Ancestor Sampler");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
AncestorListener ancestorListener = new AncestorListener() {
public void ancestorAdded(AncestorEvent ancestorEvent) {
System.out.println ("Added");
}
public void ancestorMoved(AncestorEvent ancestorEvent) {
System.out.println ("Moved");
}
public void ancestorRemoved(AncestorEvent ancestorEvent) {
System.out.println ("Removed");
}
};
f.getRootPane().addAncestorListener(ancestorListener);
f.getRootPane().setVisible(false);
f.getRootPane().setVisible(true);
f.setSize (300, 200);
f.setVisible (true);
}
}
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