线程池处理Runable和Callable任务

MyRunable类

package day01;

public class MyRunable implements Runnable{
    @Override
    public void run() {
        for (int i=0;i<8;i++){
            System.out.println(Thread.currentThread().getName()+"输出了"+i);
        }
    }
}

Mycallable类

package day01;

import java.util.concurrent.Callable;

public class MyCallable implements Callable {
    private int n;

    public MyCallable(int n) {
        this.n = n;
    }

    @Override
    public String call() throws Exception {
        int sum = 0;
        for (int i = 0; i <= n; i++) {
            sum += i;
        }
        return Thread.currentThread().getName() + "的执行结果是" + sum;
    }
}

线程池

package day01;

import java.util.concurrent.*;

public class ThreadPoolDemo01 {
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        //创建线程池对象
        
        ExecutorService pool = new ThreadPoolExecutor(3, 5, 5, TimeUnit.SECONDS,
                new ArrayBlockingQueue<>(5), Executors.defaultThreadFactory(),
                new ThreadPoolExecutor.AbortPolicy());
//        //Runable方法
//        Runnable traget = new MyRunable();
//        pool.execute(traget);
//        pool.execute(traget);
//        pool.execute(traget);
        //Callable方法的结果用future来接
        Future f1=pool.submit(new MyCallable(20));
        Future f2=pool.submit(new MyCallable(20));
        Future f3=pool.submit(new MyCallable(20));
        Future f4=pool.submit(new MyCallable(20));
        //
        System.out.println(f1.get());
        System.out.println(f2.get());
        System.out.println(f3.get());
        System.out.println(f4.get());


    }
}

注释掉Runable方法后调用Callable方法的输出结果

pool-1-thread-1的执行结果是210
pool-1-thread-2的执行结果是210
pool-1-thread-3的执行结果是210
pool-1-thread-2的执行结果是210