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This article mainly introduces "what is the atomicity of Java multithreading". In daily operation, I believe that many people have doubts about the atomicity of Java multithreading. Xiaobian consulted all kinds of data and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the doubt of "what is the atomicity of Java multithreading?" Next, please follow the editor to study!

An introduction to atomicity

Atomicity refers to: a series of operations, either all successful or all failed, will not occur half of the execution, this series of operations are inseparable.

The typical iTunes + operation is not atomic. For example, in the following illustration, inotify + is to read I, add one, and then assign a value back, which is three steps. Only by locking these three steps with a synchronized lock can atomicity be realized.

Atomic Operation in Java

Assignment of basic data types (int byte boolean short char float) except long and double

Assignment of reference for all reference types, whether on 32-bit or 64-bit machines

Atomic operations for all classes in the java.concurrent.Atomic.* package.

You can see that there are only three atomic operations in Java, and none of the others are atomic operations. Then in the concurrent environment, it may cause thread safety problems.

At this point, the study on "what is the atomicity of Java multithreading" 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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