Exercise - 5 (Inheritance)

Exercise - 5 (Inheritance)

a). Write a JAVA program to implement Single Inheritance

import java.util.Scanner;
class Add
{
  protected int a,b,sum;
  void add()
  {
    Scanner s=new Scanner(System.in);
    System.out.println("Enter two values");
    a=s.nextInt();
    b=s.nextInt();
    sum=a+b;
    System.out.println("The sum of the given numbers is:"+sum);
  }
}
class Mul extends Add
{
  int mul;
  void mul()
  {
    mul=a*b;
    System.out.println("The product of the given numbers is:"+mul);
  }
}
class Calculation
{
  public static void main(String args[])
  {
    Mul m=new Mul();
    m.add();
    m.mul(); 
  }
}

b). Write a JAVA program to implement multi level Inheritance

import java.util.Scanner;
class calculator
{
  public static void  main(String args[])
  {
  System.out.println("Enter the values:");
  Scanner s=new Scanner(System.in);
  int a=s.nextInt();
  int b=s.nextInt();
  Product pr=new Product();
  pr.Addition(a,b);
  pr.Substraction();
  pr.Mul();
  }
}
class Add
{
  protected int p,q;
  public void Addition(int x,int y)
  {
    p=x;
    q=y;
  int r=p+q;
  System.out.println("Inside of the class 'Addition' ......");
  System.out.println("The sum is:"+r);
}
}
class Sub extends Add
{
int diff;
public void Substraction()
{

  int diff=p-q;
  System.out.println("Inside of the class Sub.........");
  System.out.println("Difference is:"+diff);
}
}
class Product extends Sub
{
int prod;
public void  Mul()
{
  int prod=p*q;
  System.out.println("Inside of the class Product.......");
  System.out.println("Product is:"+prod);
}
}

c). Write a java program for abstract class to find areas of different shapes

import java.util.Scanner;
abstract class Areas
{
  public void display()
  {
  System.out.println("Inside of the abstract class....");
  }
  abstract void area();
}
class Rectangle extends Areas
{
  int base=10;
  int height=20;
  public void area()
  {
  int area=base*height;
  System.out.println("Area of the rectangle is:"+area);
  }
}
class Square extends Areas
{
  int base=15;
  public void area()
  {
  int area1=base*base;
  System.out.println("Area of the Square is:"+area1);
  }
}
class Triangle extends Areas
{
  int base=5;
  int height=15;
  public void area()
  {
  int area2=(base*height)/2;
  System.out.println("Area of the Triangle is:"+area2);
  }
}
class Geometry
{
  public static void main(String args[])
  {
  Rectangle r=new Rectangle();
  Square s=new Square();
  Triangle t=new Triangle();
  r.display();
  r.area();
  s.area();
  t.area();
  }
}