JScrollPane packs in a wrong way.

Question

I've an JInternalFrame in wich I've a JScrollPane wich contains a JPanel, wich contains something.
When I finished to create all , I pack() the JInternalFrame in order to make it as big as it contains all ..
Doing that I see something wich is smaller then I need and then I see scrollbars.
In normal situations this is not what I want..
I used scrollPane in order to leave the user free to resize the IFrame and when the screen is not enough for all contents but in the normal situation I dont want it.
Why pack does that "error".
Did I miss something ?
Tks
Tullio

Answer 1

Code? You presume that the scrollpane's perferred size will reflect the preferred size of the panel? I'm not sure that's the case. How about doing this?
Dimension dim = new Dimension(500, 400);
JPanel panel = new JPanel();
panel.setPreferredSize(dim.width, dim.height);
JScrollPanel scroll = new JScrollPane(panel);
JInternalFrame jif = new JInternalFrame("frame 1", true, true, true, true);
jif.getContentPane().add(scroll, BorderLayout.CENTER);
jif.pack();
Insets insets = jif.getInsets();
jif.setSize(dim.width + insets.left + insets.right, dim.height + insets.top + insets.bottom);
jif.setVisible(true);
desktop.add(jif);