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This article mainly introduces "the use of join () method in java". In daily operation, I believe many people have doubts about the use of join () method in java. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "the use of join () method in java". Next, please follow the editor to study!

A problem often encountered in multithreaded development is to expect a thread to execute the main thread after execution. In Java, the join () method is usually used to implement the requirements. The purpose of the join () method is that the thread to which it belongs runs the logic in the run () method. The current thread blocks indefinitely, that is, it waits for the thread to finish execution before the current thread executes. The underlying implementation principle is that the wait () method is called.

We think the director must carry out the task before carrying out the sub-task. At this point, we call the join () method to implement the requirement that the subtask executes first before the main task.

We see that we have achieved the logic we want. But there are a few other things to note when using the join () method:

It must be called after the thread starts, and it has no effect before starting it.

The join () method releases the lock immediately after execution.

At this point, the study on "the use of the join () method in java" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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