Should class methods be made static in all cases if they don’t use absolutely any class fields? [closed]

Should class methods be made static in all cases if they don’t use absolutely any class fields?

Are there exceptions? According to my logic, if a class method does not use any of its fields, then it must be static. Right?

Answer

If a method doesn’t use any instance variables in it’s containing class then it doesn’t have to be static, but it should be. As a general rule, if a method doesn’t require a class instantiation to be used then it should be extracted to a utility class/interface as a static method.