Question

How can I (natively) implement the fullscreen feature of OSX Lion in a Java application?

The current answers given incorporate a good method for achieving a sort-of-fullscreen feature. I’ve read that Eclipse may be able to use the “native” fullscreen feature of Lion. That’s what I’m asking about.

Answer 1

I found this on Apple’s Java release notes:

Mac OS X 10.7 Lion Fullscreen Support

Java applications on Lion can now opt into the Fullscreen window feature per-window. Developers can use the com.apple.eawt.FullScreenUtilities class to mark windows as able to be full screened, and the com.apple.eawt.Application.requestToggleFullScreen(Window) method to programmatically request the window enter and exit full screen mode. This API does nothing on Mac OS X 10.6 Snow Leopard.

More explicitly, try calling this early on from the constructor of your JFrames…

/**
 * @param window
 */
@SuppressWarnings({"unchecked", "rawtypes"})
public static void enableOSXFullscreen(Window window) {
    Preconditions.checkNotNull(window);
    try {
        Class util = Class.forName("com.apple.eawt.FullScreenUtilities");
        Class params[] = new Class[]{Window.class, Boolean.TYPE};
        Method method = util.getMethod("setWindowCanFullScreen", params);
        method.invoke(util, window, true);
    } catch (ClassNotFoundException e1) {
    } catch (Exception e) {
        log.log(Level.WARNING, "OS X Fullscreen FAIL", e);
    }
}