ray ray - 11 months ago 68
Java Question

What is a supertype method?

I have googled couple of times but still can't understand the supertype method. Can anyone please explain what is this?

Answer Source

There is a notion of supertype and subtype in OOPS, In java this kind of relationship is implemented by inheritance i.e. using extends keyword:

class A {} // super class
calss B extends A{} //sub class

Any member (fields, methods) declared in super class is to be called supertype.

Therefore in above context if class A has method like

class A{
   void set()

set is supertype method for class B.

However, notice that if there is another class say C:

class C {
    void set()        

Then set() method is not supertype for C class because there is no relationship between class A and class C (relationship is created by extends keyword, for inheritance).