Why are my buttons not visible in my JFrame?

Question

I'm using the following code to create a fullscreen JFrame from my Eclipse plugin. The JFrame is shown, but I can't see my button. I have no idea why not:

public class MainFrame extends JFrame {

    private static final long serialVersionUID = 1L;

    public MainFrame() {
        super();

        createComponents();
        setFullScreen();

        this.setVisible(true);
    }

    private void createComponents() {
        System.out.println("Create components");
        JButton exit = new JButton("Exit");

        exit.setVisible(true);
        exit.setBackground(Color.YELLOW);
        exit.setSize(new Dimension(500, 500));
        exit.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent arg0) {
                System.out.println("Exit by button");
                System.exit(0);
            }
        });

        this.setBackground(Color.RED);


        this.getContentPane().setLayout(new BorderLayout());
        this.getContentPane().add(exit, BorderLayout.CENTER);
    }

    private void setFullScreen() {

        this.setResizable(false);
        this.setUndecorated(true);
        this.setAlwaysOnTop(true);

        GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice[] devices = env.getScreenDevices();

        devices[0].setFullScreenWindow(this);
    }

}

The code works for mee, the button is the whole screen because of the layout. Try it with setLayout(null); — dexametason, Apr 07 '12 at 20:32
@dexametason Does it work for you if started from a Eclipse plugin= — , Apr 07 '12 at 20:36
@Roflcoptr Unfortunately I don't have any IDE in this computer, I executed it via command line. — dexametason, Apr 07 '12 at 20:37
Aren't Eclipse plugins supposed to be SWT-based, not Swing-based? — Hovercraft Full Of Eels, Apr 07 '12 at 21:01
@HovercraftFullOfEels Could be, but I couldn't find a way to achieve a fullscreen window using SWT. — , Apr 07 '12 at 21:04

score 3 · Answer 1 · edited May 23 '17 at 12:20

3

For reference, FullScreenTest is a working example.

Addendum: Because an Eclipse plugin must use SWT, you might try the approach shown in Full Screen your RCP Applications. The alternative of running maximized is also mentioned.

edited May 23 '17 at 12:20

Community

1
1

answered Apr 07 '12 at 20:32

trashgod

203,806
29
246
1,045

Yes I know that. But it is not working if I start it from my Eclipse plugin project. It works as a standalone application. – RoflcoptrException Apr 07 '12 at 20:35
Sorry, I overlooked the plugin requirement; more above. – trashgod Apr 07 '12 at 23:05

Why are my buttons not visible in my JFrame?

1 Answers1