Oops Practice

1. // this is my first oops code try creat a objeact

   
   
   
   

   public class Oops {

       int a ;

       String rakesh;

       public static void main(String[] args) {

           Oops obj = new Oops();

           Oops obj1 = new Oops();

           System.out.println(obj.rakesh);

           System.out.println(obj.a);

           System.out.println(obj1.rakesh);

       }

      

   }
2. 
   

   // try to exchange object value in instance variable;

   
   
   
   

   public class oops1 {

           int Number = 25;

           String Name = "Rakesh";

           public static void main(String[] args) {

               oops1 obj = new oops1();

               obj.Name = "Pankaj";

               System.out.println(obj.Name);

               System.out.println(obj.Number);

   
   

           }

          

       }
3. 
   

   // i am using addition class in java code and its works

   
   
   
   

   class calc{

       int Number = 33;

       String Name = "rakesh";

   
   

   }

   public class oops2 {

       public static void main(String[] args) {

           calc obj = new calc();

           System.out.println(obj.Number);

           System.out.println(obj.Name);

          

       }

      

   }
4. // this sesion i learn about over loding that how desgine a calculater and how to reuse 1 methode and how again and again perfome instance variable

   class calc {

       public int add (int a, int b){

           int result = a+b;

           return result;

       }

   
   

        public int add (int a, int b,int c ){

           int result = a+b+c;

           return result;

       }

       public double add (double a, double b, double c ){

           double result = a+b+c;

           return result;

       }

   
   

   }

   
   

   public class overloding {

       public static void main(String[] args) {

           calc obj = new calc();

      

           int result = obj.add(5,8);

           System.out.println(result);

           // this result is deffrent because instance variabel and local varial is difrrent and you use here result you shall no faca any issue

           int result1=obj.add(5,8,6);

           System.out.println(result1);

           // and this statement dedicate to perform double type you should use double type so you will allready declare double type data

           double result2 = obj.add (4.5, 8.5,8.5);

           System.out.println(result2);

          

       }

      

   }
5. // i am using import methode using overloading

   import java.util.Scanner;

   class calculator{

       public int add(int a , int b,int c){

           int result = a+b+c;

           return result;

       }

   }

   public class overloding_input {

       public static void main(String[] args) {

           Scanner sc = new Scanner(System.in);

           int a = sc.nextInt();

           int b=sc.nextInt();

           int c = sc.nextInt();

           calculator obj = new calculator();

           int result = obj.add(a,b,c);

           System.err.println(result);

           sc.close();

       }

      

   }

   
   

   //  input 85

   //        45

   //        85

   // output 215