Question

Got a Frame in Java:

 Frame AFrame = new Frame("Frame with components"); 

The frame’s top right “x” close button is not working by default.
How can I set that ?

Answer 1

You should use a JFrame and then

JFrame AFrame = new JFrame("Frame with components");
AFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

But if you insist on Frame then add a listener:

AFrame.addWindowListener(new WindowAdapter() {
    public void windowClosing(WindowEvent e) {
        System.exit(0);
    }
});