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How to understand the fail-fast mechanism in JDK, I believe that many inexperienced people do not know what to do about it. Therefore, this paper summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

Fail-fast is like its name: it is an error detection mechanism for java collections, which may be triggered when multiple threads make structural changes to the collection.

In system design, a quick failure system that can immediately report anything that may indicate a fault. Quick failure systems are usually designed to stop normal operations rather than trying to continue a process that may be defective. This design usually checks the status of the system at multiple points in the operation, so any faults can be detected early. The responsibility of the quick failure module is to detect errors and then let the next highest level of the system handle the errors.

In fact, this is an idea. Fail-fast is to consider the abnormal situation when designing the system, and once an exception occurs, it will be stopped and reported directly.

Take the simplest example of fail-fast:

Public int divide (int divisor,int dividend) {if (dividend = = 0) {throw new RuntimeException ("dividend can't be null");} return divisor/dividend;}

The above code is a method of dividing two integers. In the divide method, we do a simple check on the divisor. If the value is 0, then we directly throw an exception and clearly indicate the cause of the exception. This is actually the practical application of the concept of fail-fast.

After reading the above, have you mastered how to understand the fail-fast mechanism in JDK? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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