why JInternalFrame remove all of the other component

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i finished from adding the JInternalFrame inside my JFrame and the way frame is added is to click over the JMenuItem icon and this is goes fine but when ever the frame is added the old component are removed and white color shows up. what i am trying to do is to set fix JInternalFrame location with the other component with out effect other component

the code for JInternalFrame

    package animeaidvlcj;

import javax.swing.JInternalFrame;


/* Used by InternalFrameDemo.java. */
public class MyInternalFrame extends JInternalFrame {
    static int openFrameCount = 0;
    static final int xOffset = 0, yOffset = 25;

    public MyInternalFrame() {
        super("Document #" + (++openFrameCount), 
              true, //resizable
              true, //closable
              true, //maximizable
              true);//iconifiable

        //...Create the GUI and put it in the window...

        //...Then set the window size or call pack...
        setSize(300,300);

        //Set the window's location.
        setLocation(xOffset*openFrameCount, yOffset*openFrameCount);
    }
}

the Action code

 Action newAction = new AbstractAction("New", newIcon) {
        @Override
        public void actionPerformed(ActionEvent e) {
            desktop = new JDesktopPane();
            createFrame();
            setContentPane(desktop);
            desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
        }
    };

create method

protected void createFrame() {
    MyInternalFrame frame = new MyInternalFrame();
    frame.setVisible(true); //necessary as of 1.3
    desktop.add(frame);
    try {
        frame.setSelected(true);
    } catch (java.beans.PropertyVetoException e) {}
}

asked 1 min ago

Skube

1