What the book is referring to is polymorphism, more specifically through dynamic dispatch. In a nutshell, imagine the following classes.
The first statement just creates a reference, or a pointer if you will, to an instance of type Employee. So, here you create a reference and an object that the reference variable refers to. What is the difference between instance variable and objects?.
Reference variables can be declared as static variables, instance package org. echographapp.com; public class ReferenceDemo.
Reference variables are used to refer to an object. They are declared with a specific type which cannot be changed.
Java programming is intimately involved with object-oriented A reference is an address that indicates where an object's variables and.
There are two types of variables in Java, primitive and reference type. All the basic types e.g. int, boolean, char, short, float, long and double are.