Java by API/javax.swing.event/AncestorListener

implements AncestorListener

   <source lang="java">

import javax.swing.JFrame; import javax.swing.event.AncestorEvent; import javax.swing.event.AncestorListener; public class MainClass {

 public static void main(String[] a) {
   JFrame frame = new JFrame("Ancestor Sampler");
   frame.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");
     }
   };
   frame.getRootPane().addAncestorListener(ancestorListener);
   frame.setSize(300, 200);
   frame.setVisible(true);
   frame.getRootPane().setVisible(false);
   frame.getRootPane().setVisible(true);
 }

}

      </source>