JFrame has no close window?

Question

For some reason my JFrame doesn't have a close button? I tried changing the code but it didn't seem to work.

public NewJFrame()
{
    this.setUndecorated(true);
    this.setVisible(true);


    initComponents();

    this.setDefaultCloseOperation(NewJFrame.EXIT_ON_CLOSE);
    Toolkit tk = Toolkit.getDefaultToolkit();
    int x = (int) tk.getScreenSize().getWidth();
    int y = (int) tk.getScreenSize().getHeight();
    this.setSize(x,y);
}

Try resizing it manually with mouse - may be close button is just hidden — Ivan Pronin, Aug 08 '17 at 19:36
Similar questions have been answered [here](https://stackoverflow.com/questions/7799940/jframe-exit-on-close-java) — firefighter, Aug 08 '17 at 19:38

score 3 · Accepted Answer · answered Aug 08 '17 at 19:40

3

The close button is one of the decorations you removed with

this.setUndecorated(true);

If you want it back you'll have to remove this line or create one of your own.

answered Aug 08 '17 at 19:40

Joel Manning

66
3

JFrame has no close window?

1 Answers1