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Dynamic polymorphism in java with example program

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instanceof java

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Nickname: instanceof
Registered: Jan, 2015

instanceof java is a java related one.
Dynamic polymorphism in java with example program Posted: Jun 17, 2016 12:23 PM
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  • Polymorphism means defining multiple methods with same name.
  • Two types of polymorphism
    1.Static polymorphism
    2.Dynamic polymorphism.

Static polymorphism:

  • Defining multiple methods with same name and with different type of arguments is known as static polymorphism.
  • We can achieve this static polymorphism using method overloading.
Static polymorphism in java with example program

  1. package com.instanceofjava;
  2. class A{
  3.  
  4. public void show(int a){
  5. System.out.println("saidesh");
  6. }
  7.  
  8. public void show(int a,int b){
  9. System.out.println("ajay");
  10. }
  11.  
  12. public void show(float a){
  13. System.out.println("vinod");
  14. }
  15. public static void main(String args[]){
  16.  
  17. A a=new A();
  18.  
  19. a.show(10);
  20. a.show(1,2);
  21. a.show(1.2);
  22.  
  23. }
  24. }
Output:

  1. saidesh
  2. ajay
  3. vinod


Dynamic polymorphism:

  • Defining multiple methods with same name and with same signature in super class and sub class.
  • We can achieve dynamic polymorphism by using method overriding concept in java.
  • Define a method in super class and override same method with same signature in sub class
  • Whenever we call the method on t the object based on the object corresponding class method will be executed dynamically.
Java example program on dynamic polymorphism: (Real time example)

  1. package MethodOverridingExamplePrograms;
  2. public class Vehicle{
  3.  
  4. void Start(){ 
  5. System.out.println("Vehicle started")
  6. }

  8. }


  1. package MethodOverridingExamplePrograms;
  2. public class Car extends Vehicle{
  3.  
  4. void Start(){ 
  5. System.out.println("Car started")
  6. }

  8. }


  1. package MethodOverridingExamplePrograms;
  2. public class Bus extends Vehicle{
  3.  
  4. void Start(){ 
  5. System.out.println("Bus started")
  6. }

  8. }


  1. package MethodOverridingExamplePrograms;
  2. public class Bike extends Vehicle{
  3.  
  4. void Start(){ 
  5. System.out.println("Bike started")
  6. }

  8. }


  1. package MethodOverridingExamplePrograms;
  2. public class Test{
  3.  
  4. public static void startVehicle(Vehicle vh){ 
  5.  
  6. vh.start();
  7.  
  8. }

  10. }

Dynamic polymorphism in java with example program



  •  In the above example based on the object creation at run time corresponding class method will be executed.

Read: Dynamic polymorphism in java with example program

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