Why is this an issue?

Shared naming conventions allow teams to collaborate efficiently.

This rule raises an issue when a method name does not match a provided regular expression.

For example, with the default provided regular expression ^[a-z][a-zA-Z0-9]*$, the method:

public int DoSomething(){...} // Noncompliant

should be renamed to

public int doSomething(){...}

Exceptions

Overriding methods are excluded.

@Override
public int Do_Something(){...} // Compliant by exception