Java SE (Java Platform, Standard Edition)

Hello, I have been having a rather difficult time adding a a jscrollpane to my jinternalframe. I have a panel that I am adding some objects to. I add that panel to a jscrollpane, then add the jscrollpane to the container of the JInternalFrame. I get no errors, but when I run this thing, the panel spills out over the JInternalFrame, the panel is bigger than the internal frame. When I take the jscrollpane off of it and just add the panel directly to the JInternalFrame, it fits jsut fine. However, I need the scrollbar to view all of the material. Any ideas? Here is a piece of my code.

    JInternalFrame internal = new JInternalFrame("New Tree",true,true,true,true);
	    
	 Container c = internal.getContentPane();
	
//this panel is something I created earlier and have added stuff to it
//panel is of the type java.awt.panel
        panel.setBackground(Color.white);
        JScrollPane jsp = new JScrollPane();
        jsp.setViewportView(panel);
        c.add(jsp);

        internal.setSize(700,400);
        internal.setOpaque(true);
        internal.setVisible(true);

//I add it to a desktop pane a little later on