JDesktopPane边界-JInternalFrame没有填满整个桌面

Question

I'd like to have my JDesktopPane be such that JInternalFrames that are inside of it can be maximized and fully block out the blue background (well, blue on a Mac at least) of the JDesktopPane . If you run this demo, you'll see that if you maximize the JInternalFrame , it does not take up the entire JDesktopPane . How can I get the JDesktopPane set up so that the JInternalFrame does take up the entire JDesktopPane ?

In this image, I have ran the code below and have pressed the maximize button on the JInternalFrame, yet there is still "blue" showing on the JDesktopPane.

import java.awt.BorderLayout;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JTextArea;

/**
 *
 * @author Robert
 */
public class Temp {

    Temp() {
        boolean resizable = true;
boolean closeable = true;
boolean maximizable  = true;
boolean iconifiable = true;
String title = "Frame Title";
JInternalFrame iframe = new JInternalFrame(title, resizable, closeable, maximizable, iconifiable);

// Set an initial size
int width = 200;
int height = 50;
iframe.setSize(width, height);

// By default, internal frames are not visible; make it visible
iframe.setVisible(true);

// Add components to internal frame...
iframe.getContentPane().add(new JTextArea());

// Add internal frame to desktop
JDesktopPane desktop = new JDesktopPane();
desktop.add(iframe);

// Display the desktop in a top-level frame
JFrame frame = new JFrame();
frame.getContentPane().add(desktop, BorderLayout.CENTER);
frame.setSize(300, 300);
frame.setVisible(true);
    }
    public static void main (String[] args) {
        new Temp();
    }
}

Answer 1

It's amazing what you can find on google. I've not checked this out myself, but this might help

Disabling the shadow around JInternalFrames with the Aqua Look and Feel

Answer 2

You can override the maximizeFrame() method of the DesktopManager used by your JDesktopPane . There's a related example here .

Answer 3

Tyr this

// Add internal frame to desktop
JDesktopPane desktop = new JDesktopPane();
desktop.add(iframe);
iframe.setMaximum(true);