ThreadPoolExecutor的七个参数详解

本是古典何须时尚 2023-10-08 10:19 3阅读 0赞

> ThreadPoolExecutor的七个参数:
> 
>  *  corePoolSize 核心线程数
>  *  MaxPS 最大线程数
>  *  keepAliveTime 存活时间
>  *  TimeUnit 时间单位
>  *  BlockingQueue 任务队列
>  *  ThreadFactory 线程工厂
>  *  RejectStrategy 拒绝策略
> 
> Abort 抛异常
> 
> Discard 悄悄扔掉
> 
> DiscardOld 扔掉最先的任务
> 
> CallerRuns 谁提交任务谁来执行

package com.zhangxueliang.demo.springbootdemo.JUC.c_026_01_ThreadPool;
    
    import java.util.concurrent.ArrayBlockingQueue;
    import java.util.concurrent.Executors;
    import java.util.concurrent.ThreadPoolExecutor;
    import java.util.concurrent.TimeUnit;
    
    /**
     * @ProjectName springbootdemo_src
     * @ClassName T05_00_HelloThreadPool
     * @Desicription TODO
     * @Author Zhang Xueliang
     * @Date 2019/12/5 15:34
     * @Version 1.0
     **/
    public class T05_00_HelloThreadPool{
    
    
        public class Task implements Runnable{
            int i;
    
            public Task(int i) {
                this.i = i;
            }
    
            @Override
            public void run() {
                System.err.println(Thread.currentThread().getName()+" "+i);
            }
        }
    }
    
    class Test_T05_00_HelloThreadPool{
        public static void main(String[] args) {
            T05_00_HelloThreadPool t05_00_helloThreadPool = new T05_00_HelloThreadPool();
            ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(2, 4, 60, TimeUnit.SECONDS,
                    new ArrayBlockingQueue<Runnable>(4), Executors.defaultThreadFactory(), new ThreadPoolExecutor.AbortPolicy());
            try{
                for (int i = 0; i < 8; i++) {
                    threadPoolExecutor.execute(t05_00_helloThreadPool.new Task(i));
                }
                System.err.println(threadPoolExecutor.getQueue());
            }finally {
                threadPoolExecutor.shutdown();
            }
        }
    }

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