Question

JAVA: Quadrilateral Inheritance Hierarchy

Write an inheritance hierarchy for classes Quadrilateral, Parallelogram, Rectangle, and Square.

Use Quadrilateral as the superclass of the hierarchy. Create and use a Point class to represent the points in each shape. Make the hierarchy as deep as possible, i.e. more than two levels. Specify the instance variables and methods for each class. The private instance variables of Quadrilateral should be the x-y coordinate pairs for the four endpoints of the Quadrilateral. A program that instantiates objects of your classes and outputs each object's area (except Quadrilateral) has been provided.  

CODE:

public class QuadrilateralTest {
public static void main(String[] args) {
// NOTE: All coordinates are assumed to form the proper shapes
// A quadrilateral is a four-sided polygon
Quadrilateral quadrilateral =
new Quadrilateral(1.1, 1.2, 6.6, 2.8, 6.2, 9.9, 2.2, 7.4);

// A parallelogram is a quadrilateral with opposite sides parallel
Parallelogram parallelogram =
new Parallelogram(5.0, 5.0, 11.0, 5.0, 12.0, 20.0, 6.0, 20.0);

// A rectangle is an equiangular parallelogram
Rectangle rectangle =
new Rectangle(17.0, 14.0, 30.0, 14.0, 30.0, 28.0, 17.0, 28.0);

// A square is an equiangular and equilateral parallelogram
Square square =
new Square(4.0, 0.0, 8.0, 0.0, 8.0, 4.0, 4.0, 4.0);

System.out.printf(
"%s %s %s %s\n", quadrilateral, parallelogram,
rectangle, square);
}
}

RESULT:

Coordinates of Quadrilateral are:
2	(1.1, 1.2), (6.6, 2.8), (6.2, 9.9), (2.2, 7.4)
3
4	Coordinates of Parallelogram are:
5	(5.0, 5.0), (11.0, 5.0), (12.0, 20.0), (6.0, 20.0)
6	Width is: 6.0
7	Height is: 15.0
8	Area is: 90.0
9
10	Coordinates of Rectangle are:
11	(17.0, 14.0), (30.0, 14.0), (30.0, 28.0), (17.0, 28.0)
12	Width is: 13.0
13	Height is: 14.0
14	Area is: 182.0
15
16	Coordinates of Square are:
17	(4.0, 0.0), (8.0, 0.0), (8.0, 4.0), (4.0, 4.0)
18	Side is: 4.0
19	Area is: 16.0

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
_________________

// Point.java

public class Point {
   private double x;
   private double y;

   public Point(double x, double y) {
       this.x = x;
       this.y = y;
   }

   public double getX() {
       return x;
   }

   public void setX(double x) {
       this.x = x;
   }

   public double getY() {
       return y;
   }

   public void setY(double y) {
       this.y = y;
   }

   @Override
   public String toString() {
       return "(" + x + "," + y + ")";
   }

}
________________________

// Quadrilateral.java

public class Quadrilateral {
   private Point p1;
   private Point p2;
   private Point p3;
   private Point p4;

   public Quadrilateral(double x1, double y1, double x2, double y2, double x3, double y3,
           double x4, double y4) {
       this.p1 = new Point(x1, y1);
       this.p2 = new Point(x2, y2);
       this.p3 = new Point(x3, y3);
       this.p4 = new Point(x4, y4);
   }
  
   public Point getP1() {
       return p1;
   }

   public void setP1(Point p1) {
       this.p1 = p1;
   }

   public Point getP2() {
       return p2;
   }

   public void setP2(Point p2) {
       this.p2 = p2;
   }

   public Point getP3() {
       return p3;
   }

   public void setP3(Point p3) {
       this.p3 = p3;
   }

   public Point getP4() {
       return p4;
   }

   public void setP4(Point p4) {
       this.p4 = p4;
   }

   @Override
   public String toString() {
       return p1 + ", " + p2 + ", " + p3 + ", " + p4;
   }

}
__________________________

// Rectangle.java

import java.text.DecimalFormat;

public class Rectangle extends Quadrilateral {
private double width;
private double height;
  
   public Rectangle(double x1, double y1, double x2, double y2, double x3, double y3,
           double x4, double y4) {
       super(x1, y1, x2, y2, x3, y3, x4, y4);
       width = Math.sqrt(Math.pow((getP2().getX() - getP1().getX()), 2)
               + Math.pow((getP2().getY() - getP1().getY()), 2));
       height = Math.sqrt(Math.pow((getP4().getX() - getP1().getX()), 2)
               + Math.pow((getP4().getY() - getP1().getY()), 2));
   }

   public double area() {
      
       return width*height;
   }
   @Override
   public String toString() {
       // DecimalFormat class is used to format the output
               DecimalFormat df = new DecimalFormat(".0");
              
       return "\nCoordinates of Rectangle are:\n" + super.toString()
               + "\nWidth is :" + df.format(width) + "\nHeight is :" + df.format(height)
               + "\nArea is :" + df.format(area());
   }

}
____________________________

// Square.java

import java.text.DecimalFormat;

public class Square extends Quadrilateral {

   private double side;

   public Square(double x1, double y1, double x2, double y2, double x3, double y3,
           double x4, double y4) {
       super(x1, y1, x2, y2, x3, y3, x4, y4);
       side = Math.sqrt(Math.pow((getP2().getX() - getP1().getX()), 2)
               + Math.pow((getP2().getY() - getP1().getY()), 2));
   }

   public double area() {

       return 4 * side;
   }

   @Override
   public String toString() {
       // DecimalFormat class is used to format the output
       DecimalFormat df = new DecimalFormat(".0");
       return "\nCoordinates of Square are:\n" + super.toString()
               + "\nSide is :" + df.format(side)+"\nArea is :" + df.format(area());
   }

}
___________________________

// Parallelogram.java

import java.text.DecimalFormat;

public class Parallelogram extends Quadrilateral {
   private double width;
   private double height;

   public Parallelogram(double x1, double y1, double x2, double y2, double x3, double y3,
           double x4, double y4) {
       super(x1, y1, x2, y2, x3, y3, x4, y4);
       width = Math.sqrt(Math.pow((getP2().getX() - getP1().getX()), 2)
               + Math.pow((getP2().getY() - getP1().getY()), 2));
       height = Math.sqrt(Math.pow((getP4().getX() - getP1().getX()), 2)
               + Math.pow((getP4().getY() - getP1().getY()), 2));
   }

   public double area() {

       return width * height;
   }

   @Override
   public String toString() {
       // DecimalFormat class is used to format the output
       DecimalFormat df = new DecimalFormat(".0");
       return "\nCoordinates of Parallelogram are:\n" + super.toString()
               + "\nWidth is :" + df.format(width) + "\nHeight is :" + df.format(height)
               + "\nArea is :" + df.format(area());
   }

}
__________________________

// QuadrilateralTest.java

public class QuadrilateralTest {
public static void main(String[] args) {
// NOTE: All coordinates are assumed to form the proper shapes
// A quadrilateral is a four-sided polygon
Quadrilateral quadrilateral =
new Quadrilateral(1.1, 1.2, 6.6, 2.8, 6.2, 9.9, 2.2, 7.4);

// A parallelogram is a quadrilateral with opposite sides parallel
Parallelogram parallelogram =
new Parallelogram(5.0, 5.0, 11.0, 5.0, 12.0, 20.0, 6.0, 20.0);

// A rectangle is an equiangular parallelogram
Rectangle rectangle =
new Rectangle(17.0, 14.0, 30.0, 14.0, 30.0, 28.0, 17.0, 28.0);

// A square is an equiangular and equilateral parallelogram
Square square =
new Square(4.0, 0.0, 8.0, 0.0, 8.0, 4.0, 4.0, 4.0);

System.out.printf(
"%s %s %s %s\n", quadrilateral, parallelogram,
rectangle, square);
}
}
____________________________

Output:

(1.1,1.2), (6.6,2.8), (6.2,9.9), (2.2,7.4)
Coordinates of Parallelogram are:
(5.0,5.0), (11.0,5.0), (12.0,20.0), (6.0,20.0)
Width is :6.0
Height is :15.0
Area is :90.2
Coordinates of Rectangle are:
(17.0,14.0), (30.0,14.0), (30.0,28.0), (17.0,28.0)
Width is :13.0
Height is :14.0
Area is :182.0
Coordinates of Square are:
(4.0,0.0), (8.0,0.0), (8.0,4.0), (4.0,4.0)
Side is :4.0
Area is :16.0

_______________Could you plz rate me well.Thank You