What does fail mean in java

Fail in java refers to the fail-fast mechanism, which is an error detection mechanism in Java collections. When multiple threads perform structural changes to a collection, a fail-fast mechanism may occur.

fail in java refers to the fail-fast mechanism, which is an error detection mechanism in Java collections. When multiple threads perform structural changes to a collection, a fail-fast mechanism may occur.

Java is an object-oriented language, and many commands have special meanings. Here I will take you to know about fail.

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There is a fail-fast mechanism in Java programming

means: In system design, Rapid Fail System A system that immediately reports any conditions that may indicate a malfunction. Rapid-failure systems are typically designed to halt normal operations rather than attempt to continue a potentially defective process. This design typically checks the status of the system at multiple points in operation, so any failures can be detected early. The fail-fast module's job is to detect errors and then let the next highest level of the system handle the errors.

In fact, this is a concept. To put it bluntly, when designing the system, consider abnormal situations first. Once an abnormality occurs, stop it and report it directly.

Give the simplest fail-fast example:

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 make a simple divisor Check, if its value is 0, then an exception will be thrown directly and the cause of the exception will be clearly prompted. This is actually the practical application of the fail-fast concept.

The advantage of this is that some error conditions can be identified in advance. On the one hand, it can avoid executing complex other codes. On the other hand, after such abnormal conditions are identified, some targeted and individual processing can be done.

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