View difference between Paste ID: a6qVX2ua and ickhs4py

 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
 */