我用两种方法创建runner。但是：新的不起作用。然后我在runner1的构造上标记了调试器点。调试器点也不起作用。谁能告诉我为什么？
runner1:：new中的runnable与runnable有什么区别吗？
这是我的密码。

public static void main(String[] args) {
    Runnable n1 = Runner1::new;
    Runnable n2 = new Runner2();

    ExecutorService executorService = Executors.newFixedThreadPool(2);
    executorService.submit(n1);
    executorService.submit(n2);
    while (true) {

    }
}

public static class Runner1 implements Runnable {
    public Runner1() {
        System.out.println("construct 1");
    }

    @Override
    public void run() {
        System.out.println("hello1");
    }
}

public static class Runner2 implements Runnable {
    public Runner2() {
        System.out.println("construct 2");
    }

    @Override
    public void run() {
        System.out.println("hello2");
    }
}