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  1. import java.util.concurrent.CompletableFuture;
  2. import java.util.concurrent.ExecutionException;
  3.  
  4. class Demo {
  5.  
  6.     public static void main(String[] args) throws InterruptedException, ExecutionException {
  7.  
  8.         CompletableFuture<Integer> sharedFuture = new CompletableFuture<>();
  9.  
  10.         Thread computing = new Thread(() -> {
  11.             int value = 1;
  12.             try {
  13.                 while (!Thread.currentThread().isInterrupted() &&
  14.                         !sharedFuture.isDone()) {
  15.                     value = value * 32 + 7;
  16.                 }
  17.             } catch (Throwable t) {
  18.                 sharedFuture.completeExceptionally(t);
  19.             } finally {
  20.                 // has no effect if already completed.
  21.                 sharedFuture.complete(value);
  22.             }
  23.         });
  24.         computing.start();
  25.  
  26.         try {
  27.             Thread.sleep((long) (5000 * Math.random()));
  28.         } catch (InterruptedException ignored) {
  29.         }
  30.  
  31.         computing.interrupt();
  32.         System.out.println(sharedFuture.get());
  33.     }
  34. }
  35.  
Success #stdin #stdout 4.47s 321152KB
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-831283993
https://ideone.com/8bpEGV
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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