Snippet of FuturesA.java (https://gist.github.com/4670979) Simple example of using Futures.

FuturesA-snippet.java

ExecutorService executor = new ThreadPoolExecutor(4, 4, 1, TimeUnit.MINUTES, new LinkedBlockingQueue<Runnable>());

Future<String> f1 = executor.submit(new CallToRemoteServiceA());
Future<String> f2 = executor.submit(new CallToRemoteServiceB());

System.out.println(f1.get() + " - " + f2.get());