Can we add same JPanel twice??.. on JFrame and JDialog together!!

Hello Frnds,
my problem is quite weird!! i will try to explain..as much as I can !!
My requirement is I want to show same JPanel in JDialog and JFrame at once..!!
I am adding a
JPanel A ---> JDialog
JPanel A ---> JScrollPanel B
JScrollPane B ---> JFrame.. and making frame and dialog visible together.. but JPanel is visible in dialog only..
if i dont add in JDialog.. then JPanel is visible in frame.. !!.. but why that??
JFrame fr = new JFrame();
JPanel np = new JPanel();      // This JPanel is added Twice
np.setBounds(0, 0, 128, 128);
JScrollPane scroll=new JScrollPane(np);      // Once JPanel added here..
scroll.setPreferredSize(new Dimension(385,385));
fr.add(scroll);
JDialog dlg=new JDialog(fr, "Another Panel", false);
dlg.add(np);                        // Second Time JPanel added here..
dlg.pack();
dlg.setVisible(true);
fr.setVisible(true);

Let's make it very clear : it is NOT possible to add
the same instance of a component to two different
containers.
Is it possible to have frame with component.. but on closing that frame component shifts to another frame.. and vice versa I will add to the above:
it is NOT possible to add the same instance of a component to two different containers... at the same time. Does that clarify it?
Why is it so hard to try it yourself?
Instead of waiting a couple of hours hoping someone answers the question you could have solved your problem in a couple of minutes.

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