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How do I make an JInternalFrame stay always on top inside a JFrame

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I am creating an image proceesing application.
(check it out at )
I have several JInternal Frames inside the main frame. All but one internal frames will contain images and one JInternalFrame will contain the histogram of the currently selected JInternalFrame containing the image. I want this histogram internal frame to be always on top.
This may sound confusing. Let me explain: I have internal frames a,b,c,d all containing images. on clicking on any of these internal frames, it becomes selected (This I have done). Now in addition to that, I want another internal frame say X to be always on top. So it looks as if there are two selected internal frames (one may be any one of a,b,c,d) and thge other X. But I think a single desktop cannot have two selected internal frames. How do I make it possible.
can anybody help me? Someone told me that I can add another layer of JLayeredPane. But how exactly I do that.
I am using a cde such as:

can anyone explain with an example code?
Posts: 4121
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