直接上代码进行验证吧
/** * 通过countdownlatch的机制,来实现并发运行 * 模拟200个并发测试 * @author ll * @date 2018年4月18日 下午3:55:59 */ public class CountDownLatchTest { private static final int threadnum = 200; public CountDownLatch cd = new CountDownLatch(threadnum); @Test public void TestCountDownlatch() throws InterruptedException{ for (int i = 0; i < threadnum; i++) { new Thread(new Request()).start(); cd.countDown(); } /* * 在多线程编程中,Thread.CurrentThread 表示获取当前正在运行的线程,join方法是阻塞当前调用线程, * 直到某线程完全执行才调用线程才继续执行, * 如果获取的当前线程是主线程,调用Join方法,阻塞主线程 */ Thread.currentThread().join(); } class Request implements Runnable{ @Override public void run() { try { cd.await(); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println(Thread.currentThread()+"get one,"+System.currentTimeMillis()); } } }