import java.awt.BorderLayout;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JLayeredPane;
public class MainClass {
public static void main(String args[]) {
JFrame f = new JFrame("Sample");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLayeredPane desktop = new JDesktopPane();
desktop.setOpaque(false);
desktop.add(new SelfInternalFrame("1"), JLayeredPane.POPUP_LAYER);
f.add(desktop, BorderLayout.CENTER);
f.setSize(300, 200);
f.setVisible(true);
}
}
class SelfInternalFrame extends JInternalFrame {
public SelfInternalFrame(String s) {
getContentPane().add(new JLabel(s), BorderLayout.CENTER);
setBounds(50, 50, 100, 100);
setResizable(true);
setClosable(true);
setMaximizable(true);
setIconifiable(true);
setTitle(s);
setVisible(true);
}
}