package course;

import java.util.concurrent.*;

/**
 * @author WanJl
 * @version 1.0
 * @title ThreadPoolDemo
 * @description
 * @create 2026/8/11
 */
public class ThreadPoolDemo {
    public static void main(String[] args) {
        ThreadPoolExecutor pool=
                new ThreadPoolExecutor(2,4,60, TimeUnit.SECONDS,new ArrayBlockingQueue<>(2), Executors.defaultThreadFactory(),new ThreadPoolExecutor.AbortPolicy());

        for (int i = 1; i <=8; i++) {
            int taskId=i;
            try{
                pool.execute(()->{
                    String name = Thread.currentThread().getName();
                    System.out.println(name+"执行任务"+taskId);

                    try {
                        Thread.sleep(2000); //模拟任务耗时，占住线程
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }

                });
            }catch (RejectedExecutionException e){
                System.out.println("任务"+ taskId+"被拒绝"+e.getMessage());
            }
        }

        //观察线程池的状态：活动线程数、队列的大小
        System.out.println("活动线程数："+pool.getActiveCount());
        System.out.println("队列中任务数："+pool.getQueue().size());

        pool.shutdown();    //关闭线程池

    }
}