14.3

import java.awt.*;
import java.util.Scanner;

import javax.swing.*;

public class Test{
  public static void main(String[] args){
      GeometricObject g1 = new Square();
      GeometricObject g2 = new Square("yellow", 1,true);
      
      if(((Square)g1).filled)      
      {System.out.println("g1:");
          ((Square)g1).howToColor();}
      
      if(((Square)g2).filled)
      {System.out.println("g2:");
          ((Square)g2).howToColor();}
  }  
}

public interface Colorable {
    abstract void howToColor();
}

// GeometricObject.java: The abstract GeometricObject class
public class GeometricObject implements Comparable{
  protected String color = "white";
  protected boolean filled;
  protected int a;

  /**Default construct*/
  protected GeometricObject() {
      filled = false;
  }

  /**Construct a geometric object*/
  protected GeometricObject(String color, int a,boolean filled) {
    this.color = color;
    this.a = a;
    this.filled = filled;
  }

  public static Comparable max(Comparable c1,Comparable c2){
      if(c1.compareTo(c2)>0)
      return c1;
      else return c2;
  }
  public int compareTo(Object o){
      if(this.getArea() > ((GeometricObject)o).getArea())
          return 1;
      else if (this.getArea() == ((GeometricObject)o).getArea())
          return 0;
      else return -1;
  }
  /**Getter method for color*/
  public String getColor() {
    return color;
  }

  /**Setter method for color*/
  public void setColor(String color) {
    this.color = color;
  }

  /**Getter method for filled. Since filled is boolean,
     so, the get method name is isFilled*/
  public boolean isFilled() {
    return filled;
  }

  /**Setter method for filled*/
  public void setFilled(boolean filled) {
    this.filled = filled;
  }

  /**Abstract method findArea*/
  public  int getArea(){
      return a*a;
  }

  /**Abstract method getPerimeter*/
  public  double getPerimeter(){
      return 1;
  }
}

public class Square extends GeometricObject implements Colorable{

    public Square() {
        // TODO Auto-generated constructor stub
    }

    protected Square(String color, int a,boolean filled) {
        this.color = color;
        this.a = a;
        this.filled = filled;
      }
    @Override
    public void howToColor() {
        // TODO Auto-generated method stub
        System.out.println("Color all four sides");
    }

}