How do I close a JInternalFrame when using subclasses and a separate cla...

Question

The heading should be: How do I close a JInternalFrame when using subclasses and a separate class for the actionListener?
I have just created a JInternalFrame appclication and now I want to structure up my code. I have a Superclass that contains the usual settings for the two JInternalFrame:s, and the two subclasses with frame specific information. Both the JInternalFrames use the same OK button. I want to have the actionListener outside the classes to avoid repetition of code. But the dispose()-function does not work properly, it does not close the opened JInternalFrame. What�s wrong?
class Superclass extends JFrame
     JButton b= new JButton("ok");    
     Superclass()
class Subclass1 extends Superclass
     Subclass1 ()
          add(ok);
       ok.addActionListener(new Listener());
class Subclass2 extends Superclass
     Subclass2 ()
          add(ok);
       ok.addActionListener(new Listener());
class Listener extends Superclass implements ActionListener
     public void actionPerformed(ActionEvent e)
               dispose();
}How do I controll in the Listener class that the button in Subclass1 is beeing pressed?

Answer 1

First of all I think I misunderstood your question. You said you had two internal frames, so I thought you wanted to close the internal frame.
It now looks to me like you want to close the entire JFrame, which makes the code even a little easier. Something like:
JComponent component = (JComponent)event.getSource();
JFrame frame = (JFrame)SwingUtilities.windowForComponent( component );
frame.dispose();
Ok, I will make a try:
public static Container getAncestorOfClass(Class c, Component comp)
w.getAncestorOfClass(w, this); Fiirst you need to learn the basics of reading the API.
"getAncestorOfClass()" is a static method. That means you don't use a variable to invoke the method. You use the class itself.
"w" is a variable, which is a JFrame, but that is not what the first parameter should be. The first parameter is a "Class".
"this" will refer to your Listener class, but you need the Component that generated the ActionEvent.
When I thought you wanted to close an internal frame then the code would have been something like:
JComponent component = (JComponent)event.getSource();
Container container = SwingUtilities.getAncesterOfClass( JInternalFrame.class, component );
JInternalFrame internalFrame = (JInternalFrame)container;
internalFrame.invokeSomeMethodHere();If you need further help then you need to create a "Short, Self Contained, Compilable and Executable, Example Program (SSCCE)", that demonstrates the incorrect behaviour.
http://homepage1.nifty.com/algafield/sscce.html