线程池demo

package com.jg.study.study.threadPool;


import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;


public class ThreadPoolTest {
    public static void main(String[] args) throws Exception {
        //核心线程池大小 2
        //最大线程池大小 4
        //线程最大空闲时间 10
        //unit时间单位
        TimeUnit unit = TimeUnit.SECONDS;
        //线程等待队列
        ArrayBlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<>(2);
        //线程创建工厂
        ThreadFactory threadFactory = new NameThreadFactory();
        //拒绝策略
        RejectedExecutionHandler handler = new MyIgnorePolicy();
        ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(2, 4, 10, unit, workQueue, threadFactory, handler);
        threadPoolExecutor.prestartAllCoreThreads();//与启动所有核心线程
        for (int i = 0; i < 10; i++) {
            myTask myTask = new myTask(String.valueOf(i));
            threadPoolExecutor.execute(myTask);
        }
        System.in.read();
    }

    static class NameThreadFactory implements ThreadFactory {
        private static final AtomicInteger mThreadNum = new AtomicInteger(1);

        @Override
        public Thread newThread(Runnable r) {
            Thread thread = new Thread(r, "my thread " + mThreadNum.getAndIncrement());
            System.out.println(thread.getName() + "has been created");
            return thread;
        }
    }

    static class MyIgnorePolicy implements RejectedExecutionHandler {
        @Override
        public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) {
            doLog(r, executor);
        }

        private void doLog(Runnable r, ThreadPoolExecutor executor) {
            System.out.println(r.toString() + "reject");
        }
    }

    static class myTask implements Runnable {
        private String name;

        public myTask(String name) {
            this.name = name;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        @Override
        public String toString() {
            return "myTask{" +
                    "name='" + name + '\'' +
                    '}';
        }

        @Override
        public void run() {

            System.out.println(this.name + "running");
            try {
                Thread.sleep(300);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}