In the code provided below, you will find the class GeometricObject and Triangle a) Define a Circle class that extends GeometricObject and contains: 1. Two double data fields named x and y that specify the middle of the circle with get methods. 2. A data field radius with a get method. 3. A no-arg constructor that creates a default circle with (0, 0) for (x, y) and 1 for radius. 4. A constructor that creates a circle with the specified x, y, and radius. 5. A method getArea() that returns the area of the circle. 6. A method getPerimeter() that returns the perimeter of the circle. b) Define an EquilateralTriangle class that extends Triangle. The class contains: 1. One double data field named side to denote the side of the triangle. As we know, an equilateral triangle is a special type of triangle where the sides are of the same length. 2. A constructor that creates an EquilateralTriangle with the specified side. Pass the value of the side to Triangles constructor: Triangle(double side1, double side2, double side3). In other words, you have to call super and pass side for all three arguments: side1, side2, and side3.

c) Define a Rectangle class that extends GeometricObject. The class contains: 1. Two double data fields named side1 and side2 to denote the sides of the rectangle. 2. A no-arg constructor that creates a default rectangle with 1 for each side. 3. A constructor that creates a rectangle with the specified side1 and side2. 4. A method getArea() that returns the area of the rectangle. 5. A method getPerimeter() that returns the perimeter of the rectangle. d) Define a Square class that extends Rectangle. The class contains: 1. One double data field named side to denote the side of the square. 2. A constructor that creates a Square with the specified side. Pass the value of the side to Rectangles constructor: Rectangle(double side1, double side2). In other words, you have to call super and pass side for both arguments: side1 and side2. 3. A method getArea() that returns the area of the square. 4. A method getPerimeter() that returns the perimeter of the square. Coding: public abstract class GeometricObject {

private String color = "white";

private boolean filled;

private java.util.Date dateCreated;

/** Construct a default geometric object */

protected GeometricObject() {

dateCreated = new java.util.Date();

}

/** Construct a geometric object with color and filled value */

protected GeometricObject(String color, boolean filled) {

dateCreated = new java.util.Date();

this.color = color; this.filled = filled;

}

/** Return color */

public String getColor() {

return color;

}

/** Set a new color */

public void setColor(String color) {

this.color = color;

}

/** Return filled. Since filled is boolean,

* the get method is named isFilled */

public boolean isFilled() {

return filled;

}

/** Set a new filled */

public void setFilled(boolean filled) {

this.filled = filled;

}

/** Get dateCreated */

public java.util.Date getDateCreated() {

return dateCreated;

}

@Override

public String toString() {

return "created on " + dateCreated + " color: " + color + " and filled: " + filled;

}

/** Abstract method getArea */ public abstract double getArea(); /** Abstract method getPerimeter */ public abstract double getPerimeter(); } class Triangle extends GeometricObject { private double side1 = 1.0, side2 = 1.0, side3 = 1.0; /** Constructor */ public Triangle() { } /** Constructor */ public Triangle(double side1, double side2, double side3) { this.side1 = side1; this.side2 = side2; this.side3 = side3; } /** Override method findArea in GeometricObject */ public double getArea() { double s = (side1 + side2 + side3) / 2; return Math.sqrt(s * (s - side1) * (s - side2) * (s - side3)); } /** Override method findPerimeter in GeometricObject */ public double getPerimeter() { return side1 + side2 + side3; } /** Override the toString method */ public String toString() { // Implement it to return the three sides return "Triangle: side1 = " + side1 + " side2 = " + side2 + " side3 = " + side3; } } class Test { public static void main(String[] args) { GeometricObject gObjectArray [] = new GeometricObject [4]; //Complete your code here } private static void printAreaAndPerimeter(GeometricObject gObject) { //Complete your code here }

}