Overload

Overloading 函数重载
在同一个类中，允许存在一个以上的同名函数，只要他们的参数个数或者参数类型不同即可。与返回值无关，只看参数列表

Method Overloading is a feature that allows a class to have more than one method having the same name, if their argument lists are different. It is similar to constructor overloading in Java, that allows a class to have more than one constructor having different argument lists.

与 Override 注意区分。