Hi all, Just started to get into Java Swing for a GUI application I'm creating. I have a quick question that seemed simple, but I can't find an answer.... I have a class that holds the main GUI shell....called OSPMainFrame (as in "Main" frame...not mainframe). Anywhoo.....OSPMainFrame (extends JFrame) has a number of Panels....one of which is populated by an instance of a class OSPToolBar (extends JToolBar). I thought it best to breakout the classes this way...to keep things modular. OSPToolBar has a number of ActionListeners (they all work) for New File, Open File...etc which are attached to buttons on JToolBar. Okay, my question is this. When I run the program through the main function on OSPMainFrame I do/the follwing happens.... 1.) My GUI interface pops up and is populated as expected (OSPToolBar and other GUI isntances OSPMenu, OSPNavigation,etc). 2.) I click on the 'Open' Button on my OSPToolBar....a JFileDialog comes up as it should. 3.) I choose a file and write to the console that it was succesful. What I want to do with a 4th step is have it so the ActionListener in OSPToolBar can manipulate something in OSPMainFrame. How do I do this? I tried getParent(), getClass(), getName()....and I was able to to get the instance name for the OSPMainFrame constructor and everything. However, I can't figure out how to run a method....I tried getParent().setInternalFrame(), but it's an unrecognized method. I realize this is difficult to understand...as it is difficult to explain, but if you can help....much appreciated. Bottom line...how to call a method in an object A from a method in Object B that was called FROM Object A. Get the drit??? Psuedo code below... ---Start portion of OSPMainFrame.java public static void main(String args[]){ OSPMainFrame ospmf = new OSPMainFrame(); OSPToolBar osptb = new OSPToolBar(); //add containers, panels etc... //adding toolbar to toolbar panel ospToolBar.add(osptb); } ---END --Start Portion of OSPToolbar.java openButton.addActionListener(new ActionListener() { /** * actionPerformed * * @param actionEvent ActionEvent */ public void actionPerformed(ActionEvent actionEvent) { JFileChooser openFc = new JFileChooser(); int returnVal = openFc.showDialog(null,"Open an Open Scribe Project..."); if (returnVal == JFileChooser.APPROVE_OPTION) { **********HOW Do I access OSPMainFrame methods from here after THIS method is called???????????? ****psuedo getInstance of OSPmainFrame where this was called from perform method on OSPMainFrame - setinternalFrame } } }); ---End Thanks again...I know this is confusing....much appreciated!!!!!!!

I haven't used Swing, and never needed to do this in any of my Java projects in school...But in Visual Basic.NET you could reference the object A by saying ObjectB.Container. Also, you can pass object B a reference to Object A so it has access to its methods, or you could have object B raise an event that object A handles. Hopefully the same concepts apply in Java. -SN