通过线程池创建线程

package thread;

import java.util.concurrent.*;

/**
 * @auto dh
 * @create 2020-03-29-0:04
 */
class Th0009 implements Callable<Integer>{
    private int sum=0;
    public Integer call(){
        for(int i=1;i<=100;i++){
            sum+=i;
        }
        return sum;
    }
}
class Th009 implements Runnable {
    public  void run() {
        for (int i = 0; i <= 100; i++) {
            if (i % 2 == 0) {
                System.out.println(Thread.currentThread().getName()+":"+i);
            }

        }
    }
}

public class Thread009 {
    public static void main(String[] args) {

        Th009 th=new Th009();
        Th0009 t1=new Th0009();
//        1、通过Executors工具类来创建线程池对象
        ExecutorService executorService = Executors.newFixedThreadPool(12);
//        2、execute()用来处理Runnable接口
        executorService.execute(th);
//        submit()用来处理Callable接口
        FutureTask future= new FutureTask(t1);
        Future future1= executorService.submit(future);

        try {
//            通过FutureTask对象的get()方法获取线程的返回值
            System.out.println("当前线程的返回值："+future.get());
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }
//        3、关闭线程池
        executorService.shutdown();
    }
}