java线程池并行

一：java线程池并行

import org.junit.Test;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

public class ThreadTesst01 {
    
    @Test
    public void test01() throws InterruptedException {
        // 创建线程池
        ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(8, 16, 30, TimeUnit.SECONDS, new ArrayBlockingQueue<>(1024));
        int taskCount = 100;
        CountDownLatch countDownLatch = new CountDownLatch(taskCount);
        for (int i = 0; i < taskCount; i++) {
            threadPoolExecutor.submit(() -> {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                System.out.println(Thread.currentThread().getName() + ">>执行结束！");
                countDownLatch.countDown();
            });
        }

        // 判断是不是所有任务执行结束
        countDownLatch.await();
        System.out.println("执行完成");
    }
}