Find the area of triangle and rectangle in java

Find the area of triangle and area of rectangle in java

To write a java program to create a superclass called Figure that receives the dimensions of two-dimensional objects. It also defines a method called area that computes the area of an object. The program derives two subclasses from Figure. The first is Rectangle and the second is Triangle. Each of the sub-class overridden area() so that it returns the area of a rectangle and a triangle respectively.

Description :

create a superclass called Figure that receives the dimensions of two-dimensional objects. It also defines a method called area that computes the area of a triangle of an object. The program derives two subclasses from Figure. The first is Rectangle and the second is Triangle. Each of the sub-class overridden area() so that it returns the area of a triangle and a rectangle respectively.

Java Program to Calculate Area of Triangle Source Code

import java.io. *;

class Figure
    {
        int l, w;
    Figure(int a, int b)
    {
        l = a;
        w = b;
    }
    void area()
    {
        System.out.println("Area of the Figure");
    }
    }

    class Triangle extends Figure

    {
        Triangle(int g, int h)
    {
        super(g, h);
    }
    void area()
    {
        System.out.println("Area of triangle " + (l * w) / 2);
    }
    }

    class A
        {
            public static void main(String ar[])
        {
            Rectangle obj1 = new Rectangle(20, 20);

        obj1.area();
        }
        }

Output: Area of Triangle

Java Program to Calculate Area of Rectangle Source Code

import java.io.*;

class Figure
    {
        int l, w;
    Figure(int a, int b)
    {
        l = a;
        w = b;
    }
    void area()
    {
        System.out.println("Area of the Figure");
    }
    }

    class Rectangle extends Figure
{
            Rectangle(int k,int l)
            {
                        super(k,l);
            }
            void area()
            {
                        System.out.println("Area of rectangle is "+l*w);
            }
}

    class A
        {
            public static void main(String ar[])
        {
            Triangle obj2 = new Triangle(20, 20);

        obj2.area();
        }
        }

Output: Area of Rectangle

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