多线程模拟并发
@Test public void test1() throws InterruptedException { final CountDownLatch latch= new CountDownLatch(4);//使用java并发库concurrent //启用10个线程 for(int i=1;i<=10;i++){ new Thread(new Runnable(){ public void run(){ try { //Thread.sleep(100); } catch (Exception e) { e.printStackTrace(); } System.out.println(String.format("子线程%s执行!",Thread.currentThread().getName())); latch.countDown();//让latch中的数值减一 } }).start(); } //主线程 latch.await();//阻塞当前线程直到latch中数值为零才执行 System.out.println("主线程执行!"); }
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