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

This article mainly explains "what is the meaning of deadlock in java multithreading". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what is the meaning of deadlock in java multithreading"?

Deadlocks are encountered only when developing multithreading. The reason is that different threads are waiting for other threads to release the lock, while other threads have not been released for some reason, which causes all threads to wait for the fake death of the program. To put it bluntly, this is a BUG. Let's use the following simple program to simulate the phenomenon of deadlock.

Found that the program actually did not output, this is what we mentioned above the deadlock phenomenon. All threads are waiting for each other to release the lock, so this kind of program fake death occurs. What should we do with the deadlock if it's out of line? Because it is not easy to find the problem in multithreading. Don't worry, Java provides us with a command to help us quickly find out what the problem is. The following method is how to quickly check the problem if there is a deadlock.

We use the windows system to demonstrate. The specific steps are as follows:

We use cmd to enter the command window of the system.

Change the directory to bin in the Jdk installation directory.

Run the jps command that comes with Java

Run the jstack-l process id

Let's take a look at my specific implementation effect:

See, this command directly helps us locate a line in the code, which is very convenient for us to find out if there is a problem. If we do encounter a deadlock problem in the future development of multithreading, then we can use the above method to quickly locate the problem.

At this point, I believe you have a deeper understanding of "what is the meaning of deadlock in java multithreading". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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