package com.zzf.concurrence.cdtest;
import java.util.concurrent.CountDownLatch;
public class CountdownLatchTest {
private static CountDownLatch cd = new CountDownLatch(1000);
private static final int CONCURRENCE_COUNT = 1000 + 1;
public static void main(String[] args) {
// 一千個線程，同時懟一個方法
for (int i = 0; i < CONCURRENCE_COUNT; i++) {
new Thread(new SendTask()).start();
cd.countDown();
}
long currentTimeMillis = System.currentTimeMillis();
try {
cd.countDown();
cd.await();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("當前用時：" + (System.currentTimeMillis() - currentTimeMillis));
}
private static class SendTask implements Runnable {
@Override
public void run() {
try {
cd.await();
} catch (InterruptedException e) {
e.printStackTrace();
}
sendsms();
}
}
private static void sendsms() {
// System.out.println("信息發送成功"+System.currentTimeMillis());
}
}
