Java SE (Java Platform, Standard Edition)

I want to maximize my JInternalFrame programatically, and set default size when the user window's it by clicking the 'window' icon on the top right corner of the frame.

I am able to do both, but not together.

To maximize I use this code:

        try {
            docIntFrame.setMaximum(true);
        } catch (PropertyVetoException e) {
            e.printStackTrace();  // Just print the stack trace
        }

And to set the default size when 'windowed' I use docIntFrame.setSize(dim);

The problem is that if I use setSize() together with setMaximum() JInternalFrame will behave strange. It will look and behave as if it was maximized, but it will not fill the whole JDesktopPane.

If I drop the setSize(), the JInternalFrame will be very small when windowed.

I cannot use JInternalFrame.setMinimumSize() since the content of the JInternalFrame is a scrollpane which should be able to be small.

Setting the content of the JInternalFrame's preferred sizes and sizes does not seem to affect how the JInternalFrame sizes.

Any suggestions?