This is a follow up question to a previously asked question (link: https://www.chegg.com/homework-help/questions-and-answers/want-write-java-program-implement-classes-methods-geometrical-shapes-using-inheritance-pol-q27044090).

Three classes are missing from the full code posted below: Trapezoid.java, Circle.java, and Plane.java

Please fill in the missing classes. The test method (PlaneTest.java) cannot be edited. Edit the other methods to fix errors in the code (refer to original post for full description of problem).

These are the skeletons and descriptions of the missing classes:

Trapezoid.java:

**********************************

Circle.java:

**********************************

Plane.java:

Plane.java cannot use ArrayList, addShape() must have its own add method:

**********************************

CODE

===============================

Point.java

********************************

class Point {

private double x, y;

public Point(double x, double y) {

this.x = x;

this.y = y;

}

public double getX() {

return x;

}

public double getY() {

return y;

}

public double getDistance(Point point) {

return Math.sqrt(Math.pow(x - point.getX(), 2) + Math.pow(y - point.getY(), 2));

}

}

Shape.java

*************************************

abstract class Shape{

public abstract double getArea();

public abstract double getPerimeter();

}

Symmetric.java

***************************************

interface Symmetric{

Point getPointOfSymmetry();

}

Triangle.java

********************************

class Triangle extends Shape{

private Point firstPoint;

private Point secondPoint;

private Point thirdPoint;

public Triangle(Point firstPoint, Point secondPoint, Point thirdPoint) {

this.firstPoint = firstPoint;

this.secondPoint = secondPoint;

this.thirdPoint = thirdPoint;

}

public Point getFirstPoint() {

return firstPoint;

}

public Point getSecondPoint() {

return secondPoint;

}

public Point getThirdPoint() {

return thirdPoint;

}

@Override

public double getArea() {

double s = getPerimeter()/2;

double a = firstPoint.getDistance(secondPoint);

double b = secondPoint.getDistance(thirdPoint);

double c = thirdPoint.getDistance(firstPoint);

double area = Math.sqrt(s * (s-a) * (s-b) * (s-c));

return area;

}

@Override

public double getPerimeter() {

double a = firstPoint.getDistance(secondPoint);

double b = secondPoint.getDistance(thirdPoint);

double c = thirdPoint.getDistance(firstPoint);

return a + b + c;

}

}

Rectangle.java

***************************************

class Rectangle extends Shape{

private Point topLeftPoint;

private double length;

private double width;

public Rectangle(Point topLeftPoint, double length, double width) {

super();

this.topLeftPoint = topLeftPoint;

this.length = length;

this.width = width;

}

public Point getTopLeftPoint() {

return topLeftPoint;

}

public double getLength() {

return length;

}

public double getWidth() {

return width;

}

@Override

public double getArea() {

return length * width;

}

@Override

public double getPerimeter() {

return 2 * (length + width);

}

}

Trapezoid.java

**********************************************

class Trapezoid extends Shape{

@Override

public double getArea() {

// TODO Auto-generated method stub

return 0;

}

@Override

public double getPerimeter() {

// TODO Auto-generated method stub

return 0;

}

}

Circle.java

**********************************************

class Circle extends Shape implements Symmetric{

@Override

public Point getPointOfSymmetry() {

// TODO Auto-generated method stub

return null;

}

@Override

public double getArea() {

// TODO Auto-generated method stub

return 0;

}

@Override

public double getPerimeter() {

// TODO Auto-generated method stub

return 0;

}

}

EquilateralTriangle.java

************************************************

class EquilateralTriangle extends Triangle implements Symmetric{

private Point topPoint;

private double side;

private static Point bottomLeft;

private static Point bottomRight;

/*

{

double h = Math.sqrt(3) * side / 2;

bottomLeft = new Point(topPoint.getX() - side/2, topPoint.getY() - h);

bottomRight = new Point(topPoint.getX() + side/2, topPoint.getY() - h);

}

*/

public EquilateralTriangle(Point topPoint, double side) {

super(bottomLeft, bottomRight, topPoint);

this.topPoint = topPoint;

this.side = side;

double h = Math.sqrt(3) * side / 2;

bottomLeft = new Point(topPoint.getX() - side/2, topPoint.getY() - h);

bottomRight = new Point(topPoint.getX() + side/2, topPoint.getY() - h);

}

public Point getTopPoint() {

return topPoint;

}

public double getSide() {

return side;

}

public static Point getBottomLeft() {

return bottomLeft;

}

public static Point getBottomRight() {

return bottomRight;

}

@Override

public Point getPointOfSymmetry() {

double h = Math.sqrt(3) * side / 2;;

return new Point(side/2, 2*h/3);

}

}

Square.java

**********************************

class Square extends Rectangle implements Symmetric{

private Point topLeft;

private double side;

public Square(Point topLeft, double side) {

super(topLeft, side, side);

this.side = side;

this.topLeft = topLeft;

}

public double getSide() {

return side;

}

@Override

public Point getPointOfSymmetry() {

return new Point(topLeft.getX() + side/2, topLeft.getY() - side/2);

}

}

Plane.java

**********************************************

//missing

PlaneTest.java (THIS IS THE TEST METHOD, DO NOT EDIT!)

**********************************************

import java.util.Scanner;

public class PlaneTest {

/*

Test 1: the point class for using positive and negative doubles.

Should have the following at the bottom of the console

Please enter 4 doubles for two points

The x-coor of the first point:

4.1

The y-coor of the first point:

5.5

The distance between the points:

2.92

Please enter 4 doubles for two points

The x-coor of the first point:

4.1

The y-coor of the first point:

-5.5

The distance between the points:

8.88

Please enter 4 doubles for two points

The x-coor of the first point:

-4.1

The y-coor of the first point:

5.5

The distance between the points:

6.80

Please enter 4 doubles for two points

The x-coor of the first point:

-4.1

The y-coor of the first point:

-5.5

The distance between the points:

10.80

*/

private static String test1 = "point 4.1 5.5 2.3 3.2 point 4.1 -5.5 2.3 3.2 point -4.1 5.5 2.3 3.2 point -4.1 -5.5 2.3 3.2 q";

/*

Test 2: the triangle class with a right triangle, an acute triangle and an obtuse triangle

Should have the following at the bottom of the console

Please enter 6 doubles for three points of a triangle

The x-coor of the first point:

4.3

The y-coor of the second point:

4.5

The x-coor of the third point:

1.2

The area:

3.41

The perimeter:

9.10

Please enter 6 doubles for three points of a triangle

The x-coor of the first point:

4.3

The y-coor of the second point:

4.5

The x-coor of the third point:

1.2

The area:

3.41

The perimeter:

8.78

Please enter 6 doubles for three points of a triangle

The x-coor of the first point:

3.3

The y-coor of the second point:

4.5

The x-coor of the third point:

1.2

The area:

2.31

The perimeter:

8.32

*/

private static String test2 = "triangle 4.3 6.7 1.2 4.5 1.2 6.7 triangle 4.3 5.7 1.2 4.5 1.2 6.7 triangle 3.3 6.7 0.2 4.5 1.2 6.7 q";

/*

Test 3: rectangle class

Should have the following at the bottom of the console

Please enter 2 doubles for the topLeftPoint of the rectangle

Please enter 2 doubles for the length and width of the rectangle

The y-coor of the top left point:

1.2

The length:

6.1

The width:

2.5

The area:

15.25

The perimeter:

17.20

Please enter 2 doubles for the topLeftPoint of the rectangle

Please enter 2 doubles for the length and width of the rectangle

The y-coor of the top left point:

1.2

The length:

1.4

The width:

9.2

The area:

12.88

The perimeter:

21.20

*/

private static String test3 = "rectangle 5.4 1.2 6.1 2.5 rectangle -5.4 1.2 1.4 9.2 q";

/*

Test 4: trapezoid class where topLeftPoint's x value is less than bottomLeftPoint's x value

Should have the following at the bottom of the console

Please enter 4 doubles for the two points of the trapezoid

Please enter 2 doubles for the sides of the trapezoid

The x-coor of the top left point:

1.2

The y-coor of the bottom left point:

-3.4

The top side length:

5.1

The bottom side length:

5.1

The area:

34.68

The perimeter:

24.01

Please enter 4 doubles for the two points of the trapezoid

Please enter 2 doubles for the sides of the trapezoid

The x-coor of the top left point:

1.3

The y-coor of the bottom left point:

1.3

The top side length:

10.3

The bottom side length:

6.8

The area:

29.93

The perimeter:

24.99

Please enter 4 doubles for the two points of the trapezoid

Please enter 2 doubles for the sides of the trapezoid

The x-coor of the top left point:

1.3

The y-coor of the bottom left point:

-1.3

The top side length:

6.8

The bottom side length:

10.9

The area:

53.98

The perimeter:

32.00

*/

private static String test4 = "trapezoid 1.2 3.4 2.4 -3.4 5.1 5.1 trapezoid 1.3 4.8 2.5 1.3 10.3 6.8 trapezoid 1.3 4.8 2.5 -1.3 6.8 10.9 q";

/*

Test 5: trapezoid class where topLeftPoint's x value is greater than bottomLeftPoint's x value

Should have the following at the bottom of the console

Please enter 4 doubles for the two points of the trapezoid

Please enter 2 doubles for the sides of the trapezoid

The x-coor of the top left point:

4.4

The y-coor of the bottom left point:

1.3

The top side length:

9.7

The bottom side length:

5.4

The area:

26.43

The perimeter:

26.62

Please enter 4 doubles for the two points of the trapezoid

Please enter 2 doubles for the sides of the trapezoid

The x-coor of the top left point:

4.4

The y-coor of the bottom left point:

1.3

The top side length:

3.4

The bottom side length:

5.4

The area:

15.40

The perimeter:

16.44

*/

private static String test5 = "trapezoid 4.4 4.8 2.2 1.3 9.7 5.4 trapezoid 4.4 4.8 2.2 1.3 3.4 5.4 q";

/*

Test 6:

Should have the following at the bottom of the console

Please enter 2 doubles for the center of the circle

Please enter 1 double for the radius of the circle

The x-coor of the center:

-8.5

The radius:

7.3

The area:

167.42

The perimeter:

45.87

The x-coor and y-coor of the point of symmetry:

-8.50 -5.60

*/

private static String test6 = "circle -8.5 -5.6 7.3 q";

/*

Test 7: equilateraltriangle class

Should have the following at the bottom of the console

Please enter 2 doubles for the topPoint of the equilateral triangle

Please enter 1 double for the side of the equilateral triangle

The x-coor of the top point:

8.5

The x&y-coor of the first point:

8.50 -5.60

The x&y-coor of the second point:

4.85 -11.92

The x&y-coor of the third point:

12.15 -11.92

The side length:

7.3

The area:

23.08

The perimeter:

21.90

The x-coor and y-coor of the point of symmetry:

8.50 -9.81

*/

private static String test7 = "equiltri 8.5 -5.6 7.3 q";

/*

Test 8: square class

Should have the following at the bottom of the console

Please enter 2 doubles for the topLeft of the square

Please enter 1 double for the side of the square

The y-coor of the top left point:

5.6

The side length:

7.3

The width:

7.3

The area:

53.29

The perimeter:

29.20

The x-coor and y-coor of the point of symmetry:

-4.85 1.95

*/

private static String test8 = "square -8.5 5.6 7.3 q";

/*

Test 9: plane class (empty plane and plane where shapes overlap)

Should have the following at the bottom of the console

Please enter shapes

The sum of the areas:

0.00

The sum of the perimeters:

0.00

Center of point of symmetries is null

Please enter shapes

The sum of the areas:

15.19

The sum of the perimeters:

29.52

Center of point of symmetries is null

*/

private static String test9 = "plane inputDone plane t 3.3 6.7 0.2 4.5 1.2 6.7 r 3.3 6.7 1.4 9.2 inputDone q";

/*

Test 10: plane class (plane with multiple points of symmetry and plane with multiple of the same shape)

Should have the following at the bottom of the console

Please enter shapes

The sum of the areas:

171.03

The sum of the perimeters:

53.47

The x-coor and y-coor of the point of symmetry:

0.47 -2.57

Please enter shapes

The sum of the areas:

281.47

The sum of the perimeters:

132.09

The x-coor and y-coor of the point of symmetry:

0.00 -7.71

*/

private static String test10 = "plane c -8.5 -5.6 7.3 s 8.5 1.4 1.9 inputDone plane c -8.5 -5.6 7.3 t 3.3 6.7 0.2 4.5 1.2 6.7 tr 1.3 4.8 2.5 -1.3 6.8 10.9 tr 1.2 3.4 2.4 -3.4 5.1 5.1 e 8.5 -5.6 7.3 inputDone q";

public static void main(String[] args) {

Scanner scan = new Scanner(System.in);

Point p1;

Point p2;

Point p3;

double s1;

double s2;

String command = "";

while (command != "q") {

command = scan.next();

switch(command) {

case "point":

System.out.println("Please enter 4 doubles for two points");

p1 = new Point(scan.nextDouble(), scan.nextDouble());

p2 = new Point(scan.nextDouble(), scan.nextDouble());

System.out.println("The x-coor of the first point:");

System.out.println(p1.getX());

System.out.println("The y-coor of the first point:");

System.out.println(p1.getY());

System.out.println("The distance between the points:");

System.out.printf("%.2f%n",p1.getDistance(p2));

break;

case "triangle":

System.out.println("Please enter 6 doubles for three points of a triangle");

p1 = new Point(scan.nextDouble(), scan.nextDouble());

p2 = new Point(scan.nextDouble(), scan.nextDouble());

p3 = new Point(scan.nextDouble(), scan.nextDouble());

Triangle t = new Triangle(p1,p2,p3);

System.out.println("The x-coor of the first point:");

System.out.println(t.getFirstPoint().getX());

System.out.println("The y-coor of the second point:");

System.out.println(t.getSecondPoint().getY());

System.out.println("The x-coor of the third point:");

System.out.println(t.getThirdPoint().getX());

System.out.println("The area:");

System.out.printf("%.2f%n",t.getArea());

System.out.println("The perimeter:");

System.out.printf("%.2f%n",t.getPerimeter());

break;

case "rectangle":

System.out.println("Please enter 2 doubles for the topLeftPoint of the rectangle");

p1 = new Point(scan.nextDouble(),scan.nextDouble());

System.out.println("Please enter 2 doubles for the length and width of the rectangle");

s1 = scan.nextDouble();

s2 = scan.nextDouble();

Rectangle r = new Rectangle(p1,s1,s2);

System.out.println("The y-coor of the top left point:");

System.out.println(r.getTopLeftPoint().getY());

System.out.println("The length:");

System.out.println(r.getLength());

System.out.println("The width:");

System.out.println(r.getWidth());

System.out.println("The area:");

System.out.printf("%.2f%n",r.getArea());

System.out.println("The perimeter:");

System.out.printf("%.2f%n",r.getPerimeter());

break;

case "trapezoid":

System.out.println("Please enter 4 doubles for the two points of the trapezoid");

p1 = new Point(scan.nextDouble(),scan.nextDouble());

p2 = new Point(scan.nextDouble(),scan.nextDouble());

System.out.println("Please enter 2 doubles for the sides of the trapezoid");

s1 = scan.nextDouble();

s2 = scan.nextDouble();

Trapezoid tr = new Trapezoid(p1,p2,s1,s2);

System.out.println("The x-coor of the top left point:");

System.out.println(tr.getTopLeftPoint().getX());

System.out.println("The y-coor of the bottom left point:");

System.out.println(tr.getBottomLeftPoint().getY());

System.out.println("The top side length:");

System.out.println(tr.getTopSide());

System.out.println("The bottom side length:");

System.out.println(tr.getBottomSide());

System.out.println("The area:");

System.out.printf("%.2f%n",tr.getArea());

System.out.println("The perimeter:");

System.out.printf("%.2f%n",tr.getPerimeter());

break;

case "circle":

System.out.println("Please enter 2 doubles for the center of the circle");

p1 = new Point(scan.nextDouble(),scan.nextDouble());

System.out.println("Please enter 1 double for the radius of the circle");

s1 = scan.nextDouble();

Circle c = new Circle(p1,s1);

System.out.println("The x-coor of the center:");

System.out.println(c.getCenter().getX());

System.out.println("The radius:");

System.out.println(c.getRadius());

System.out.println("The area:");

System.out.printf("%.2f%n",c.getArea());

System.out.println("The perimeter:");

System.out.printf("%.2f%n",c.getPerimeter());

System.out.println("The x-coor and y-coor of the point of symmetry:");

System.out.printf("%.2f",c.getPointOfSymmetry().getX());

System.out.print(" ");

System.out.printf("%.2f%n",c.getPointOfSymmetry().getY());

break;

case "equiltri":

System.out.println("Please enter 2 doubles for the topPoint of the equilateral triangle");

p1 = new Point(scan.nextDouble(),scan.nextDouble());

System.out.println("Please enter 1 double for the side of the equilateral triangle");

s1 = scan.nextDouble();

EquilateralTriangle e = new EquilateralTriangle(p1,s1);

System.out.println("The x-coor of the top point:");

System.out.println(e.getTopPoint().getX());

System.out.println("The x&y-coor of the first point:");

System.out.printf("%.2f",e.getFirstPoint().getX());

System.out.print(" ");

System.out.printf("%.2f%n",e.getFirstPoint().getY());

System.out.println("The x&y-coor of the second point:");

System.out.printf("%.2f",e.getSecondPoint().getX());

System.out.print(" ");

System.out.printf("%.2f%n",e.getSecondPoint().getY());

System.out.println("The x&y-coor of the third point:");

System.out.printf("%.2f",e.getThirdPoint().getX());

System.out.print(" ");

System.out.printf("%.2f%n",e.getThirdPoint().getY());

System.out.println("The side length:");

System.out.println(e.getSide());

System.out.println("The area:");

System.out.printf("%.2f%n",e.getArea());

System.out.println("The perimeter:");

System.out.printf("%.2f%n",e.getPerimeter());

System.out.println("The x-coor and y-coor of the point of symmetry:");

System.out.printf("%.2f",e.getPointOfSymmetry().getX());

System.out.print(" ");

System.out.printf("%.2f%n",e.getPointOfSymmetry().getY());

break;

case "square":

System.out.println("Please enter 2 doubles for the topLeft of the square");

p1 = new Point(scan.nextDouble(),scan.nextDouble());

System.out.println("Please enter 1 double for the side of the square");

s1 = scan.nextDouble();

Square s = new Square(p1,s1);

System.out.println("The y-coor of the top left point:");

System.out.println(s.getTopLeftPoint().getY());

System.out.println("The side length:");

System.out.println(s.getSide());

System.out.println("The width:");

System.out.println(s.getWidth());

System.out.println("The area:");

System.out.printf("%.2f%n",s.getArea());

System.out.println("The perimeter:");

System.out.printf("%.2f%n",s.getPerimeter());

System.out.println("The x-coor and y-coor of the point of symmetry:");

System.out.printf("%.2f",s.getPointOfSymmetry().getX());

System.out.print(" ");

System.out.printf("%.2f%n",s.getPointOfSymmetry().getY());

break;

case "plane":

Plane p = new Plane();

System.out.println("Please enter shapes");

String input = scan.next();

while (!input.equals("inputDone")) {

if (input.equals("t")) {

p.addShape(new Triangle(new Point(scan.nextDouble(),scan.nextDouble()),

new Point(scan.nextDouble(),scan.nextDouble()),

new Point(scan.nextDouble(),scan.nextDouble())));

}

else if (input.equals("r")) {

p.addShape(new Rectangle(new Point(scan.nextDouble(),scan.nextDouble()),

scan.nextDouble(),

scan.nextDouble()));

}

else if (input.equals("tr")) {

p.addShape(new Trapezoid(new Point(scan.nextDouble(),scan.nextDouble()),

new Point(scan.nextDouble(),scan.nextDouble()),

scan.nextDouble(),

scan.nextDouble()));

}

else if (input.equals("c")) {

p.addShape(new Circle(new Point(scan.nextDouble(),scan.nextDouble()),

scan.nextDouble()));

}

else if (input.equals("e")) {

p.addShape(new EquilateralTriangle(new Point(scan.nextDouble(),scan.nextDouble()),

scan.nextDouble()));

}

else if (input.equals("s")) {

p.addShape(new Square(new Point(scan.nextDouble(),scan.nextDouble()),

scan.nextDouble()));

}

input = scan.next();

}

System.out.println("The sum of the areas:");

System.out.printf("%.2f%n",p.getSumOfAreas());

System.out.println("The sum of the perimeters:");

System.out.printf("%.2f%n",p.getSumOfPerimeters());

if (p.getCenterOfPointOfSymmetries() == null) {

System.out.println("Center of point of symmetries is null");

} else {

System.out.println("The x-coor and y-coor of the point of symmetry:");

System.out.printf("%.2f",p.getCenterOfPointOfSymmetries().getX());

System.out.print(" ");

System.out.printf("%.2f%n",p.getCenterOfPointOfSymmetries().getY());

}

break;

case "q":

System.exit(0);

break;

}

}

scan.close();

}

}

class Trapezoid extends Shape ( topSide, double bottomSide); Creates a trapezoid using top-left and bottom-left corners as well as the length of the top and bottom public Trapezoid (Point topLeftPoint, Point bottomLeftPoint, double sides. public Point getTopLeftPoint); Returns the top-left corner of the trapezoid