14.1

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

import javax.swing.*;

public class Test extends JFrame {
  public static void main(String[] args) {
      Comparable a1 = new GeometricObject("white",10);
      Comparable a2 = new GeometricObject("yellow",20);
      Comparable a3 = GeometricObject.max(a1, a2);
      
      
      System.out.println("the bigger on is:");
      System.out.print(((GeometricObject)a3).getColor());
  }  
}

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

  /**Default construct*/
  protected GeometricObject() {
  }

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

  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;
  }
}