Background class first attempt

Background.java

public class Background {

   private final ExecutorService mService = new ScheduledThreadPoolExecutor(5);
   
   public Future<?> execute(Runnable runnable) {
      return mService.submit(runnable);
   }
   public <T> Future<T> submit(Callable<T> runnable) {
      return mService.submit(runnable);
   }
}