Shulou(Shulou.com)06/02 Report--

What this article shares to you is about what is the difference between submit and execute in Java. The editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article.

1. The received parameters are different.

2. Submit has a return value, but execute does not

Use the example of the return value, for example, I have a lot of task for validation, I want all the task to finish, and then each task tells me its execution result, whether it is a success or failure, and if it is a failure, what is the reason.

Then I can combine all the reasons for the failure and send it to the caller.

Personally, I think cancel execution is of little use, and there is little need to cancel the implementation.

And the greatest use should be the second point.

3. Submit is convenient for Exception processing.

It means that if you throw checked or unchecked exception in your task

And you want the outside caller to be aware of the exception and handle it in a timely manner, so you need to use submit to catch the exception thrown by Future.get.

The following Mini Program demonstrates the submit method

Public class RunnableTestMain {public static void main (String [] args) {ExecutorService pool = Executors.newFixedThreadPool (2); / * execute (Runnable x) has no return value. The task can be executed, but it cannot be determined whether the task completed successfully. * / pool.execute (new RunnableTest ("Task1")); / * submit (Runnable x) returns a future. You can use this future to determine whether the task was completed successfully. Please see the following: * / Future future = pool.submit (new RunnableTest ("Task2")); try {if (future.get () = = null) {/ / if Future's get returns null, task completed System.out.println ("task completed") }} catch (InterruptedException e) {} catch (ExecutionException e) {/ / otherwise we can see why the task failed System.out.println (e.getCause (). GetMessage ());} public class RunnableTest implements Runnable {private String taskName; public RunnableTest (final String taskName) {this.taskName = taskName } @ Override public void run () {System.out.println ("Inside" + taskName); throw new RuntimeException ("RuntimeException from inside" + taskName);}} above is the difference between submit and execute in Java. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.