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  1. import java.util.concurrent.CountDownLatch;
  2.  
  3. class b {
  4. static final CountDownLatch countdown = new CountDownLatch(3);
  5.  
  6. public static void main(String[] args) {
  7.  
  8.     for (int i = 0; i < 3; ++i) {
  9.         Thread t = new Thread() {
  10.             public void run() {
  11.                 System.out.printf("Starting on %d other threads.\n",
  12.                         countdown.getCount());
  13.                 countdown.countDown();
  14.                 System.out.printf("new on %d other threads.\n",
  15.                         countdown.getCount());
  16.                 try {
  17.                     countdown.await(); // waits until everyone reaches this
  18.                                         // point
  19.                     // System.out.println("Go again : "
  20.                     // +countdown.getCount());
  21.                 } catch (Exception e) {
  22.                 }
  23.             }
  24.         };
  25.         t.start();
  26.  
  27.     }
  28.     System.out.println("Go");
  29. }
  30.  
  31. }
Success #stdin #stdout 0.04s 247808KB
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Standard input is empty
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Starting on 3 other threads.
new on 2 other threads.
Starting on 2 other threads.
new on 1 other threads.
Go
Starting on 1 other threads.
new on 0 other threads.
https://ideone.com/EloGi9
language:
Java (HotSpot 12)
created:
13 years ago
visibility:
secret

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