How to set JInternalFrame's size

Question

i have a JFrame in which i set the content pane with a JDesktopPane.

jDesktopPane1 = new JDesktopPane();
setContentPane(jDesktopPane1);

My JFrame is full screen size, when i add a JInternalFrame with size 300x300

Main.getInstance().setSize(Toolkit.getDefaultToolkit().getScreenSize());
c = new Clients();
c.setVisible(true);
setEnabled(true);
Main.getInstance().addInDesktop(c);

In Clients:

this.setPreferredSize(new java.awt.Dimension(300, 300));

On my mac osx all works fine, if i use it on a windows machine the jinternalframe takes fullscreensize even if i set size or preferredsize. What can i do? It's possible all this changes between the two os?

Answer 1

I would refer to the InternalFrameDemo in Oracle's Documentation. Your program may not be set up in the same manner as this example, but it should definitely help. I was able to get the program to work properly and I have a Windows OS.

Also, be sure to include these lines of code in createMethod() before frame.setVisible(true); if you want to refer to this example.

// Set your preferred size and location here
frame.setSize(x,y);
frame.setLocation(x,y);

Answer 2

setPreferredSize(new Dimension(700, 500));
setMaximumSize(new Dimension(700, 500));
setMinimumSize(new Dimension(700, 500));
setMaximizable(true);

work for me!