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

You can hide a part of JFrame that contains the swing controls which you want on another JFrame.

When the user clicks on a Jbutton the JFrame width increases and when he clicks on another same kind of Jbutton the JFrame comes to the default size.

  JFrame myFrame = new JFrame("");
  JButton button1 = new JButton("Basic");
  JButton button2 = new JButton("More options");
 // actionPerformed block code for button1 (Default size)  
 myFrame.setSize(400, 400);
//  actionPerformed block code for button2 (Increase width)
 myFrame.setSize(600, 400);