// concurrent/Futures.java // (c)2021 MindView LLC: see Copyright.txt // We make no guarantees that this code is fit for any purpose. // Visit http://OnJava8.com for more book information. import java.util.*; import java.util.concurrent.*; import java.util.stream.*; public class Futures { public static void main(String[] args) throws InterruptedException, ExecutionException { ExecutorService exec = Executors.newSingleThreadExecutor(); Future f = exec.submit(new CountingTask(99)); System.out.println(f.get()); // [1] exec.shutdown(); } } /* Output: 99 pool-1-thread-1 100 100 */