Practice questions on Java Classes and Objects – Find Area of rectangle using Constructor

Write a program to print the area of two rectangles having sides (4,5) and (5,8) respectively by creating a class named ‘Rectangle’ with a method named ‘Area’ which returns the area and length and breadth passed as parameters to its constructor.

Solution

import java.util.*;

class Rectangle
{
    int len;
    int bre;
     
    Rectangle(int l, int b)
    {
        len=l;
        bre=b;
    }

    public int getArea(){
        return len*bre;
    }

    public int getPerimeter(){
        return 2*(len+bre);
    }
}

class Shape
{
   public static void main(String args[])
   {
     Rectangle ob1=new Rectangle(4,5);
     Rectangle ob2=new Rectangle(5,8);
     System.out.println("Area is "+ob1.getArea()+" Perimeter is "+ob1.getPerimeter());  
     System.out.println("Area is "+ob2.getArea()+" Perimeter is "+ob2.getPerimeter());
   }
}

Save the above Program with “Shape.Java” then compile it with the following commands:

javac Shape.java   //to compile the code

java Shape        // to run the code

Output is :

Area is 20Perimeter is 18
Area is 40Perimeter is 26