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Create a class for a circle in Java

Create a class for a circle - Java:


/**
* This class is used to create a circle.
* @author Juan Antonio Brenha Moral
*/
public class Circle {
   /**
   * This method calculate the area of a circle.
   * @param radius radius of the circle.
   * @return double Obtains the area of the circle.
   */   
   public double area(double radius) {
       //Variable to store the area
       double area = 0;
       //Calculate the area
       area = Math.PI * Math.pow(radius,2);
       //Return the area
       return area;
   }

   /**
   * One Example
   */
   public static void main(String args[]) throws IOException {

      Circle  circle= new Circle ();
      //Example
      double area = circle.area(5);
      //Output
      System.out.println("Area of a circle with radius 5 is :" + area); //78.53981633974483
   }
}
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