// 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<Integer> f =

exec.submit(new CountingTask(99));

System.out.println(f.get()); // [1]

exec.shutdown();

}

}

/* Output:

99 pool-1-thread-1 100

100

*/