主线程中执行scheduledexecutorservice的scheduled方法 ,两个线程执行顺序

Question

主线程中执行scheduledexecutorservice的scheduled方法 ，主线程会等代码 如果不会等待 怎么做能让其等待

Answer 1

我测试验证了下，主线程会等待，因为ScheduledExecutorService没有被shutdown，你的需求是什么？如果你希望执行结束后结束进行，那么shutdown即可。

你参考下以下例子:

public static void main(String[] args) throws IOException {
        Object agentInfo = null;
        Integer samplingInterval = 30;

        ScheduledExecutorService executorService = new ScheduledThreadPoolExecutor(10);
        executorService.schedule(new WatchAgent(agentInfo), 1, TimeUnit.SECONDS);
//        executorService.scheduleAtFixedRate(new WatchAgent(agentInfo), 0, samplingInterval, TimeUnit.SECONDS);
        System.err.println("FINISH");
}

static class WatchAgent implements Runnable {

    public WatchAgent(Object info){

    }

    public void run(){
        try{
            System.out.println("Running " + this.hashCode() + " - started on/at " + (new Date()));
            Thread.sleep(6000);
            System.out.println("Running " + this.hashCode() + " - finished on/at " + (new Date()));
        }catch(Exception ex){
            ex.printStackTrace();
        }
    }
}