How to define the internal frame in different file in java and how to call them in JFrame?

I am at present doing a project in which I need help I want to include more internalFrames in my Project as Child frames in different files and I want to connect them in a single JFrame and also I want to display other componets in that iternalframe and also I have the Jtree in which i am calling my internalframes.

How to define the internal frame in different file in java and how to call them in JFrame?
I didn't understand what exactly is the question, but try these two links that explain about JInternalFrame.





http://java.sun.com/docs/books/tutorial/...





http://www.iam.ubc.ca/guides/javatut99/u...