线程池submit和execute方法区别

1、接收的参数不一样

public class MainTest {

    public static void main(String[] args) throws Exception {
        ExecutorService pool = Executors.newFixedThreadPool(10);
        pool.execute(new Runnable() {
            @Override
            public void run() {
                System.out.println("execute");
            }
        });

        Future<?> submit = pool.submit(new Runnable() {
            @Override
            public void run() {
                System.out.println("submit");
            }
        });
        //等任务执行完毕会打印null
        System.out.println(submit.get());

        FutureTask<Integer> submit2 = (FutureTask<Integer>) pool.submit(new Callable<Integer>() {
            @Override
            public Integer call() throws Exception {
                System.out.println("submit_2");
                return 2;
            }
        });
        System.out.println("result=" + submit2.get());
    }

}

2、返回值不一样

submit有返回值Future，而execute没有。
Java FutureTask

3、submit方便Exception处理

public class MainTest {

    public static void main(String[] args) throws Exception {
        ExecutorService pool = Executors.newFixedThreadPool(10);

        Future submit = pool.submit(new Runnable() {
            @Override
            public void run() {
                System.out.println("submit");
                System.out.println(0/0);
            }
        });
        try {
            System.out.println("result=" + submit.get());
        }catch (Exception e){
            System.out.println(e);
        }
    }

}