Multiple JInternalFrames

Question

I am using several JInternalFrames within a single JFrame. As of now each JInternalFrame is an inner class within the JFrame class. I want to seperate each JInternalFrame into its own class. If I do this how do I get the button in one JInternalFrame to set another JInternalFrame to visable seeing how we have no global variable in Java. I want to create all JInteranlFrame at once inside the Main JFrame. I do not want to be recreating the JInternalFrames each time I want to display them.
This is not the exact code but I hope it gives you an idea.
class MainJFrame extends JFrame {
JDesktopPane d1;
JButton b1;
InternalFrame_A a1 = new InternalFrame_A();
InternalFrame_A b1 = new InternalFrame_A();
d1.add(b1);
b1 Action = setVisable(a1);
class InternalFrame_A extends JInternalFrame {
JButton A1;
A1 Action = setVisable(b1);
class InternalFrame_B extends JInternalFrame {
JButton B1;
B1 Action = setVisable(a1);
}

Answer 1

Sorry, let me try to clarify. This is an application with a main menu (MainFrame). You submit an action on this main menu (A button). This brings up a form (JInternalFram_A). After filling out this form and hitting the submit button (a1), another form or menu open (JInternalFrame_B). After doing something and hitting submit or cancel the main menu come back up. I meant setting focu not visability. When main menu (MainFrame) has focus all other JInternalFrames are hiden behind it. And likewise for other JInternalFrames. Basically you can only see 1 JInternalFrame at a time.
Hopefully this helps.