1. Make the Circle object itself comparable by comparing their radius. You must use interface Comparable.

2. Make the Circle object cloneable using interface Cloneable by copying radius.

3. In the project2.java (main function), you need to use a java sorting tool to check if your array of Circle objects working or not and also test clone method.

4. You need to submit Circle.java and project2. java.

Circle.java

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(); }

GeometricObject.java

public class Circle extends GeometricObject { private double radius; public Circle() { } public Circle(double radius) { this.radius = radius; } /** Return radius */ public double getRadius() { return radius; } /** Set a new radius */ public void setRadius(double radius) { this.radius = radius; } @Override /** Return area */ public double getArea() { return radius * radius * Math.PI; } /** Return diameter */ public double getDiameter() { return 2 * radius; } @Override /** Return perimeter */ public double getPerimeter() { return 2 * radius * Math.PI; } /* Print the circle info */ public void printCircle() { System.out.println("The circle is created " + getDateCreated() + " and the radius is " + radius); } }