how to close a frame when button clicks

Question

I am new to Java Swing. I am creating a frame with some components.

I have to close the frame and open another frame when the button is clicked. I had tried setVis

Answer 1

looking at your code, you'll probably need something like this:

            if(frame == null)
                frame = new JFrame();
            else {
                //remove the previous JFrame
                frame.setVisible(false);
                frame.dispose();
                //create a new one
                frame = new JFrame();
            }

you'll have to put this inside the actionperformed method so that the frame can be removed.. btw, it would be a gd idea to change your class variables from public to private, in accordance with good programming practice..

EDIT: To answer the "flickering" problem. you're accessing the swing component from outside the event thread. swing widgets arent generally thread safe. as such, u need to modify your main method:

public static void main(String[] args) {
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            designUI();
        }
    });
}

also, refer to Swing component flickering when updated a lot for further queries.

Answer 2

You can send a closing event to the frame/dialog. Like this:

WindowEvent winClosingEvent = new WindowEvent( targetFrame, WindowEvent.WINDOW_CLOSING );
Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent( winClosingEvent );

I sometimes implement close() method in my frames/dialogs like this:

public void close() {
    WindowEvent winClosingEvent = new WindowEvent( this, WindowEvent.WINDOW_CLOSING );
    Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent( winClosingEvent );
}

Hope that helped...

Answer 3

Did you try calling dispose() on the frame? I think that may be what you're looking for.