Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicLong;

public class Main {
    public static void main(String[] args) {
        CountDownLatch latch = new CountDownLatch(1);
        for (int threadNo = 0; threadNo < 1000; threadNo++) {
            Runnable t = new Test(latch);
            new Thread(t).start();
        }
        try {
            latch.await();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("done");
    }
}

class Test implements Runnable {
    CountDownLatch latch;

    public Test(CountDownLatch latch) {
        this.latch = latch;
    }

    private static AtomicLong number = new AtomicLong(0);

    public long next() {
        return number.getAndIncrement();
    }

    @Override
    public void run() {
        try {
            Thread.sleep(1000 + (int) (Math.random() * 3000));
            System.out.println(next());
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            latch.countDown();
        }
    }
}