Overloading in Java and multiple dispatch

Question

I have a collection (or list or array list) in which I want to put both String values and double values. I decided to make it a collection of objects and using overloading o

Answer 1

Everything in Java is an Object/object (except primitive types). You store strings and integers as objects, and then as you call the prove method they are still referred to as objects. You should have a look at the instanceof keyword. Check this link

void prove(Object o){
   if (o instanceof String)
    System.out.println("String");
   ....
}