Playing with Google Guice: Splash Screens

The previous entry showed the creation of a (very) simple single frame application. Splash screens are common, so lets add one. Since there’s no easy way to do it for all occasions, we’ll use a Guice module to provide it for runtimes prior to Java 6.

public static void main(String[] args)
{
   URL splashImage = Main.class.getResource("/images/splash.png");

   // create the splash module for pre Java 6 runtimes.
   Module splashModule = Java5SplashScreenModule(splashImage);
   Launcher.launch(MyApplication.class, args, splashModule);
}

And that’s it. The framework will display the splash screen and all will work fine. Of course if you’re running on Java 6 you’d used the Java 6 version (that uses the new SplashScreen functionality). Of course if we don’t define the service in one of our modules, the framework uses the default `NullSplashScreenService`.

If MyApplicationFrame (or any other class for that matter) wanted to use the splash screen service, it just needs to inject it into it’s constructor.

public class MyApplicationFrame extends JFrame
{
   @Inject
   public MyApplicationFrame(SplashScreenService splashService)
   {
      // do stuff....
      splashService.setImageURL(nextImageURL);
   }
}