手写改造线程池和拒绝策略

通过创建线程池执行器的构造方法去手动创建一个自己的线程池.

package ThreadPoll;
/*
创建一个线程池
corePoolSize=2,maximumPoolSize=5,keepAliveTime=1,keepAliveTime=TimeUnit.SECONDS
,workQueue=new LinkedBlockingQueue(3),threadFactory=Executors.defaultThreadFactory()
handler=new ThreadPoolExecutor.CallerRunsPolicy());
*/
import java.util.concurrent.*;

public class MyThreadPool {
    public static void main(String[] args){
        ExecutorService threadPool=  //自定义线程池
                new ThreadPoolExecutor(
                        2,
                        5,
                        1,
                        TimeUnit.SECONDS,
                        new LinkedBlockingQueue(3),//任务队列容量设为3
                        Executors.defaultThreadFactory()
                        ,new ThreadPoolExecutor.CallerRunsPolicy());//自定义拒绝策略
        for(int i=1;i<=10;i++){
            int d=i;
            threadPool.execute(()->{
                System.out.println(Thread.currentThread().getName()+"办理业务"+d);//模拟处理业务
            });
        }

    }
}