线程池处理Runnable任务

线程池如何处理Runnable任务

使用ExecutorService的方法：
void execute(Runnable target)

package com.itheima.d8_threadpool;
 
public class MyRunnable implements Runnable{
    @Override
    public void run() {
        for (int i = 0; i < 5; i++) {
            System.out.println(Thread.currentThread().getName() + "输出了：HelloWorld ==> "  + i);
        }
        try {
            System.out.println(Thread.currentThread().getName() + "本任务与线程绑定了，线程进入休眠了~~~");
            Thread.sleep(10000000);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

package com.itheima.d8_threadpool;
 
import java.util.concurrent.*;
 
/**
    目标：自定义一个线程池对象，并测试其特性。
 */
public class ThreadPoolDemo1 {
    public static void main(String[] args) {
        // 1、创建线程池对象
        /**
         public ThreadPoolExecutor(int corePoolSize,
                                 int maximumPoolSize,
                                 long keepAliveTime,
                                 TimeUnit unit,
                                 BlockingQueue<Runnable> workQueue,
                                 ThreadFactory threadFactory,
                                 RejectedExecutionHandler handler)
         */
        ExecutorService pool = new ThreadPoolExecutor(
                3,
                5 ,
                6,
                TimeUnit.SECONDS,
                new ArrayBlockingQueue<>(5) ,
                Executors.defaultThreadFactory(),
               new ThreadPoolExecutor.AbortPolicy()
        );
 
        // 2、给任务线程池处理。
        Runnable target = new MyRunnable();
        pool.execute(target);
        pool.execute(target);
        pool.execute(target);
 
        pool.execute(target);
        pool.execute(target);
        pool.execute(target);
        pool.execute(target);
        pool.execute(target);
 
        // 创建临时线程
        pool.execute(target);
        pool.execute(target);
//        // 不创建，拒绝策略被触发！！！
//        pool.execute(target);
 
        // 关闭线程池（开发中一般不会使用）。
        // pool.shutdownNow(); // 立即关闭，即使任务没有完成，会丢失任务的！
        pool.shutdown(); // 会等待全部任务执行完毕之后再关闭（建议使用的）
    }
}