My Java swing GUI doesn't repaint until I resize the window. I create a FrameView with a menuBar (with menu items whose events cause the loading of different JPanels via FrameView's setComponent) and a dummy/empty JPanel. When user selects a menu item, a custom JPanel is created and FrameView's setComponent is called with this as a parameter. When I run it and select the menu item, I don't see the new JPanel being loaded -- until I manually resize the window. Any help? Following is the code snippet:
Whenever you add / remove a component to / from a JComponent (like JPanel) while the application is already running you need to revalidate() and repaint() the component. For AWT controls the same holds but there is no revalidate() method so invalidate() should be called instead.