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package StudentSubject;

/* Write a program to define an abstract class Shapes. The Shapes class will be inherited by Circle and Rectangle classes.
 * Circle and Rectangle will add and implement the abstract methods to calculate their areas and Perimeter.
 * There will be a display() method, which will display the dimensions, area and perimenter of respective Shapes.
 * Please use the below class diagram:
 *
 *  -------------------------------
 *  | Shape :Abstract             |
 *  -------------------------------
 *  | # height: double            |
 *  | # width: double             |
 *  | # radius : double           |
 *  | # areaVal: double           |
 *  | # perimeterVal: double      |
 *  -------------------------------
 *  | + Area():void               |
 *  | + Perimeter():void          |
 *  | + Display():void            |
 *  -------------------------------
 *           |                         \
 *           |                          \
 *           |                           \
 *  -------------------------------        -------------------------------
 *  | Circle                      |        | Rectangle                   |
 *  -------------------------------        -------------------------------
 *  | + Circle()                  |        | + Rectangle()               |
 *  | + Circle(double, double)    |        | + Rectangle(double, double) |
 *  | + Area(): void              |        | + Area(): void              |
 *  | + Perimeter(): void         |        | + Perimeter(): void         |
 *  | + Display(): void           |        | + Display(): void           |
 *  -------------------------------        -------------------------------
 *
 * Hint:
 * 1. For area of circle use Math.PI, Area = PI*radius*radius
 * 2. Perimeter of circle = 2 * PI * radius
 * 3. Area of rectangle = height * width
 * 4. Perimeter of rectangle = 2(height + width)
 * 5. Check the main method before creating the Shapes, Circle and Rectangle class
 * 6. # means protected access
 *
 */
public class Week8Program1 {

    public static void main(String[] args) {
        // Create Shape objects
        Circle circle = new Circle(4.0);
        Rectangle rectangle = new Rectangle(5.0,4.0);

        // Calculate the area and perimenter of Circle and Rectangle
        circle.area();
        circle.perimeter();

        rectangle.area();
        rectangle.perimeter();

        // Display the dimensions, area and perimeter of Circle and Rectangle
        circle.display();
        rectangle.display();
    }
}

//Define the abstract Shapes class
abstract class Shapes{

    protected double height;
    protected double width;
    protected double radius;

    protected double areaVal;
    protected double perimeterVal;

    abstract void area();
    abstract void perimeter();
}

//Define Circle class which extends Shapes
class Circle extends Shapes{

    // Complete the code to define constructors
    Circle(){

    }

    Circle(double radius){
        this.radius = radius;
    }

    // Complete the code to define Area, Perimenter and Display methods
    void area(){
        this.areaVal = Math.PI * Math.pow(radius, 2)   ;
    }

    void perimeter(){
        this.perimeterVal =2 * Math.PI * radius ;
    }

    void display(){
        System.out.println("The Radius of Circle is: "+this.radius);
        System.out.println("Area of the Circle is: "+this.areaVal);
        System.out.println("Perimeter of the Circle is: "+this.perimeterVal);
    }
}

//Complete the code to define Circle class which extends Shapes
// 1. Define two constructors
// 2. Define the Area, Perimeter and Display method
// Hint: Refer to the Circle if required
class Rectangle extends Shapes{

    Rectangle(double a, double b)
    {
        this.height = a;
        this.width = b;
    }

    void area(){
        this.areaVal = height * width ;
    }

    void perimeter(){
        this.perimeterVal = 2 * (height + width) ;
    }

    void display(){
        System.out.println("The height & width of Rectangle is: ("+this.height + " ," + this.width + ")" );
        System.out.println("Area of the Rectangle is: "+this.areaVal);
        System.out.println("Perimeter of the Rectangle is: "+this.perimeterVal);
    }

}

/* The program should produce the following result
* Test case 1:
* Initialize the circle with radius: 4
* Initialize the rectangle with ht and wd: 5, 4
*
* Expected output:
* The Radius of Circle is: 4.0
* Area of the Circle is: 50.26548245743669
* Perimeter of the Circle is: 25.132741228718345
*
* The height and width of Rectangle is: (5.0 ,4.0)
* Area of the Rectangle is: 20.0
* Perimeter of the Rectangle is: 18.0
*/