Calculate area of rectangle using class in java

Let’s learn to calculate area of rectangle using class in java.

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.

Also read – sparse matrix and its representations in java

Here’s java program to find the area of rectangle using class and object,

// area class java
import java.io.*;

// rectangle class java code
class RectangleShape 
{
   int length, breadth; 
   void setValue(int l, int b) 
   { 
       length = l; 
       breadth = b; 
   }
   // get area of rectangle
   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