Calculate area of rectangle using class in java

In this post we are going to learn to calculate area of rectangle using class in java.

Also read – area of rectangle java program

Calculate area of rectangle using class in java

To calculate area of rectangle in java,

• first create class “RectangleShape”. This class has two integer variables length, breadth.
• to set values for variables length and breadth setValue() method is created.
• In findArea() method we are calculating area of rectangle and in turn returning area.
• In the main() method create object of class RectangleShape.
• assign values for length and breadth. Finally calculate area by calling findArea() method.

Here’s the java example to calculate area of rectangle using classes,

import java.io.*;

class RectangleShape 
{
   int length, breadth; 
   void setValue(int l, int b) 
   { 
       length = l; 
       breadth = b; 
   }
   int findArea() 
   { 
       return(length * breadth); 
   }
}

public class RectangleAreaDemo
{
   public static void main(String[] args)
   {
      RectangleJava obj = new RectangleJava(); 
      obj.setValue(10, 5); 
      System.out.println("Area of rectangle : " + obj.findArea());
   }
}

Output:

Area of rectangle : 50