Java – how to solve ‘define and throw special exceptions instead of using general exceptions.’

When the length of the two lists is not equal, I need to throw runtimeException We use the sonarqube tool for code review

This is the code:

if (objctArray.length != columnArray.length) {
                throw new RuntimeException(String.format("objctArray and columnArray length is not same. objctArray length = %d,columnArray length = %d",objctArray.length,columnArray.length));
            }

Now, sonarqube raises the problem of defining and throwing special exceptions instead of using general exceptions Throw a new runtimeException line I don't know which example I can replace to solve the sonarqube problem

Solution

If these two lists are parameters passed to the method, illegalargumentexception will be a good candidate It is a subclass of runtimeException, so you will still throw a runtimeException

if (objctArray.length != columnArray.length) {
    throw new IllegalArgumentException(String.format("objctArray and columnArray length is not same. objctArray length = %d,columnArray.length));
}