Stop ExecutorService

Look at this code, it won’t stop:

public static void main(String[] args) throws Exception{
    ExecutorService executorService = Executors.newSingleThreadExecutor();
    Runnable r = () -> {
        System.out.println(1);
    };
    executorService.submit(r);
}

Main reason is that it didn’t call executorService.shutdown();

Exector is a simple interface. It only has a execute() function. ExecutorService has shutdown() function, which can stop the thread.

So below is the complete one:

public static void main(String[] args) throws Exception{
    ExecutorService executorService = Executors.newSingleThreadExecutor();
    Runnable r = () -> {
        System.out.println(1);
    };
    executorService.submit(r);
    executorService.shutdown();
}