Explain Java Runtime Polymorphism With the help of an Example ?

Method overriding is one of the good examples of Runtime Ploymorphism in Java. With method overriding methods are bound to object instances during runtime which is best explained by the Java Sample Code below

package com.javainterviewquestion.corejava;

public class RuntimePolymorphismCheck extends BaseClass{ public void test() { System.out.println(" In the test Method for Child Class"); } public static void main(String args[]) { BaseClass childClass = new RuntimePolymorphismCheck(); childClass.test(); }

}

class BaseClass { public BaseClass() { test(); } public void test() { System.out.println(" In the test Method for Base Class"); } }

This question stumps quite a few people but the output of the above code is

In the test Method for Child Class

or

In the test Method for Child Class In the test Method for Base Class

But the actual output of the above code is

In the test Method for Child Class In the test Method for Child Class

as Java decides at runtime as to what class should the object bind to.