//file: Desktop.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

public class Desktop {
  public static void main(String[] args) {
    // create a JFrame to hold everything
    JFrame f = new JFrame("Desktop");
    f.addWindowListener(new WindowAdapter(  ) {
      public void windowClosing(WindowEvent we) { System.exit(0); }
    });
    f.setSize(300, 300);
    f.setLocation(200, 200);

    JDesktopPane desktop = new JDesktopPane(  );
    for (int i = 0; i < 5; i++) {
      JInternalFrame internal =
          new JInternalFrame("Frame " + i, true, true, true, true);
      internal.setSize(180, 180);
      internal.setLocation(i * 20, i * 20);
      internal.setVisible(true);
      desktop.add(internal);
    }

    f.setContentPane(desktop);
    f.setVisible(true);
  }
}