Java swing application, close one window and open another when button is clicked

Question

I have a netbeans Java application that should display a JFrame (class StartUpWindow extends JFrame) with some options when the application is launched, then the user clicks

Answer 1

Call below method just after calling the method for opening new window, this will close the current window.

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

Also in properties of JFrame, make sure defaultCloseOperation is set as DISPOSE.