Write an Area class that has simply three overloaded static methods: getArea for

Question

Write an Area class that has simply three overloaded static methods: getArea for calculating the areas of the following geometric shapes: Circles Rectangles Cuboids Here are the formulas for calculating the area of the shapes. Area of    a circle: Area = pir^2, where, pi is Math.PI and r is the circle's radius. Area of rectangle: Area = Width times Length Area of cuboid: Area = 2 (length times height + width times height + length times width) Because the three methods are to be overloaded, they should each have the same name getArea, but different parameter lists. Demonstrate the class in a complete program. 

Explanation / Answer

AreaDemo.java

import java.util.Scanner;

public class AreaDemo {

   /**
   * @param args
   */
   public static void main(String[] args) {
       // TODO Auto-generated method stub
       Scanner scan = new Scanner(System.in);
       System.out.println("Please enter radius of circle");
       double radius = scan.nextDouble();
       System.out.println("Circle Area : "+Area.getArea(radius));
       System.out.println("Please enter the width and length of Ractangle");
       double width = scan.nextDouble();
       double length = scan.nextDouble();
       System.out.println("Ractangle Area : "+Area.getArea(width, length));
       System.out.println("Please enter the width, length and height of Cuboid");
       double cubWidth = scan.nextDouble();
       double cubLength = scan.nextDouble();
       double cubHeight = scan.nextDouble();
       System.out.println("Cuboid Area : "+Area.getArea(cubWidth, cubLength, cubHeight));
      
      
   }

}

Area.java

public class Area {
   public static final double PI = 3.14;
   public static double getArea(double radius){
       return PI * radius * radius;
   }
   public static double getArea(double width, double length){
       return width * length;
   }
   public static double getArea(double width, double length, double height){
       return 2 * (width * length + length * height + height * width);
   }  
}

Output:

Please enter radius of circle
2.2
Circle Area : 15.197600000000003
Please enter the width and length of Ractangle
2.2 3.3
Ractangle Area : 7.26
Please enter the width, length and height of Cuboid
2.2 3.3 4.4
Cuboid Area : 62.92

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