import javax.swing.*;

public class DesktopContainer{
	JFrame frame;
	JPanel panel;
	JInternalFrame iframe;
	JButton button1, button2;
	JDesktopPane desk;
	public static void main(String[] args) {
		DesktopContainer d = new DesktopContainer();
	}
	public DesktopContainer(){
		frame = new JFrame("Creating a JDesktopPane Container");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		iframe = new JInternalFrame("Internal frame", true,true,true,true);
		iframe.setToolTipText("This is internal frame");
		panel = new JPanel();
		button1 = new JButton("Ok");
		button1.setToolTipText("This is Ok button of internal frame");
		panel.add(button1);
		button2 = new JButton("Cancel");
		button2.setToolTipText("This is cancel button of internal frame");
		panel.add(button2);
		iframe.add(panel);
		iframe.setSize(250,300);
		iframe.setVisible(true);
		desk = new JDesktopPane();
		desk.add(iframe);
		frame.add(desk);
		frame.setSize(400,400);
		frame.setVisible(true);
	}
}