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; }

@Override public String toString() { return String.format("Circle [id-%d, radius-%.2f, area-%.2f, perimeter-%.2f]", this.getId(), radius, getArea(), getPerimeter()); } }

import java.util.Comparator;

public class GeoComparator implements Comparator {

}

public abstract class GeometricObject { private static int idGen = 1; private String color = "white"; private boolean filled; private int id;

/** Construct a default geometric object */ protected GeometricObject() { id = idGen; idGen++; }

/** Construct a geometric object with color and filled value */ protected GeometricObject(String color, boolean filled) { id = idGen; idGen++; 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 id */ public int getId() { return id; }

/** Return a string representation of this object */ public String toString() { return "[id: " + id + " color: " + color + " and filled: " + filled + "]"; }

/** Abstract method getArea */ public abstract double getArea();

/** Abstract method getPerimeter */ public abstract double getPerimeter(); }

import java.util.ArrayList; import java.util.Collections; import java.util.Comparator;

public class Main { public static void main(String[] args) { ArrayList geoObjects = new ArrayList<>(); GeometricObject g1 = new Rectangle(5, 5); GeometricObject g2 = new Circle(5); GeometricObject g3 = new Rectangle(10, 10); GeometricObject g4 = new Circle(10); GeometricObject g5 = new Rectangle(15, 5); GeometricObject g6 = new Rectangle(10, 10);

geoObjects.add(g1); geoObjects.add(g2); geoObjects.add(g3); geoObjects.add(g4); geoObjects.add(g5); geoObjects.add(g6); for (GeometricObject g: geoObjects) { if (g instanceof Circle) { System.out.println((Circle) g); } else { System.out.println((Rectangle) g); } }

//TODO1: sort the geo objects by increasing order of their perimeters, then by their areas, then by created dates //Note that you cannot modify GeometricObject.java, Circle.java, or Rectangle.java //TODO1 end System.out.println(" Increasing order of perimeter and then area and then dates: "); for (GeometricObject g: geoObjects) { if (g instanceof Circle) { System.out.println((Circle) g); } else { System.out.println((Rectangle) g); } } //TODO2: sort the geo objects by decreasing order of their perimeters (please DO NOT create a new comparactor class for this purpose.) //TODO2 end System.out.println(" Decreasing order of perimeter and then area and then dates: "); for (GeometricObject g: geoObjects) { if (g instanceof Circle) { System.out.println((Circle) g); } else { System.out.println((Rectangle) g); } } } }

public class Rectangle extends GeometricObject { private double width; private double height;

public Rectangle() { }

public Rectangle(double width, double height) { this.width = width; this.height = height; }

/** Return width */ public double getWidth() { return width; }

/** Set a new width */ public void setWidth(double width) { this.width = width; }

/** Return height */ public double getHeight() { return height; }

/** Set a new height */ public void setHeight(double height) { this.height = height; }

@Override /** Return area */ public double getArea() { return width * height; }

@Override /** Return perimeter */ public double getPerimeter() { return 2 * (width + height); } @Override public String toString() { return String.format("Rectangle [id-%d, width-%.2f, height-%.2f, area-%.2f, perimeter-%.2f]", this.getId(), width, height, getArea(), getPerimeter()); } }

in java code

GeometricObject.java, Circle.java, and Rectangle.java are provided for you. Please do not modify these three files.

You will complete the following two files:

File 1: GeoComparator.java

• Create a Comparator class for comparing GeometricObject objects by their perimeters.

File 2: Main.java

1. Create an ArrayList of GeometricObject. (ALREADY DONE)
2. Use Collections.sort to sort the list in the increasing order of the perimeters.
3. Use Collections.sort to sort the list in the decreasing order of the perimeters. Use the reverseOrder() method on the comparator object in (2) to get a comparator that compares the GeometricObject objects in the reverse order of perimeters. Please do not define a new Comparator class.