Polymorphism and Method Overloading and Overriding- Example0008

Polymorphism and Method Overloading and Overriding- Example0008

This example of Polymorphism(One of the characteristics of the  - Both Compile and Runtime shown here.
Method Overloading (Compile time Polymirphism)- Two methods defined in both parent and child Classes with same name but without differnet arguments
Method Overriding (Run time Polymorphism) - Two methods defined with same name and same inputs, but output can be different
package com.swprogramdeveloper;

Keyword: java, polymorphism, method overloading, method overriding, compile polymorphism, runtime polymorphism, arguments

//Textual presentation of an object, how it will look like in the memory
//Whatever we write in class is actually belong to object. Note: if you want something for class, need to write static
class Product {
    //Attribute
        int pid;
        String name;
        int price;

        //Constructor
        Product() {
        System.out.println(">>Product Object Constructed");
        }

        //Methods
        //Method one to initialize data
         void setProductDetails(int pid, String name, int price){
         this.pid=pid;
         this.name=name;
         this.price=price;
         }

        //Method to display data
         void showProductDetails(){
             System.out.println("-----Product ID: "+pid+"----------");
             System.out.println("Name:\t"+name);
             System.out.println("Price:\t"+price);
             System.out.println("---------------------------");
         }

        }

//IS-A relation and extends
//Example without defining method overloading and Method overriding
 class Mobile extends Product {
    // Constructor
    Mobile() {
        System.out.println("--Mobile Constructor created---");
    }
}

//IS-A relation and extends example with additional attribute for the Child Product
//Example with defining method overloading and Method overriding
class MobileA extends Product {
     // Additional attribute
    String os;
    int ram;

    // Constructor
    MobileA() {
        System.out.println("--MobileA Constructor created---");
    }

        // Method one to initialize data
        // Method name same as that of Parent Class with additional inputs
        // This is Method Overloading - Compile time Polymorphism, also called Static Polymorphism

        void setProductDetails(int pid, String name, int price, String os, int ram){
            this.pid=pid;
            this.name=name;
            this.price=price;
            this.os=os;
            this.ram=ram;
        }

    // Method one to display data
    // Method name same as that of Parent Class - Input is same, Output is different
    // This is Method Overriding - Run time Polymorphism
    void showProductDetails(){
        System.out.println("-----Product ID: "+pid+"----------");
        System.out.println("Name:\t"+name);
        System.out.println("Price:\t"+price);
        System.out.println("OS:\t" + os);
        System.out.println("RAM:\t" + ram);
        System.out.println("---------------------------");
    }

    }


public class Main {

    public static void main(String[] args) {
// write your code here

        // Creating class from extended class
        System.out.println("---Output of extended mobile class from product----");
        //without method overloading or overriding
        Mobile mobile1 = new Mobile();

        mobile1.setProductDetails(980,"mi note2",23000);
        mobile1.showProductDetails();

        //example- method overloading and method overriding
        MobileA mobile1A = new MobileA();

        mobile1A.setProductDetails(980,"mi note2",23000,"Android",128);
        mobile1A.showProductDetails();


    }
}



Output0008
==========

---Output of extended mobile class from product----
>>Product Object Constructed
--Mobile Constructor created---
-----Product ID: 980----------
Name: mi note2
Price: 23000
---------------------------
>>Product Object Constructed
--MobileA Constructor created---
-----Product ID: 980----------
Name: mi note2
Price: 23000
OS: Android
RAM: 128
---------------------------

Process finished with exit code 0