java.lang.Number doesn't implement “+” or any other operators?

Question

I\'m creating a class which is supposed to be able to be used with an array of any type of number (float, int, etc), so here is one method I have:

// T exten         


        

Answer 1

Sadly, you can't. Arithmetic operators work only on primitive types (and thanks to autoboxing and autounboxing on their wrappers). You have to override the given method for all the primitive types that you require the method to work on, as is done in many JDK classes.