Chapter 10, Problem 19E

Program Plan Intro

  Given program

     import java.util.ArrayList;

     import java.util.Collections;

     //Declare PointDemo class

     public class PointDemo

     {

         public static void main(String[] args)

         {

             //Define variables

             Point p1 = new Point(2, 8);

             Point p2 = new Point(7, 2);

             Point p3 = new Point(3, 4);

             Point p4 = new Point(1, 4);

             //Declare variable points

             ArrayList points = new ArrayList();

             points.add(p1);

             points.add(p2);

             points.add(p3);

             points.add(p4);

             //Print the statement

 System.out.println("Points in the list before sorting: "    + points);

             Collections.sort(points);

 System.out.println("Points in the list after sorting: "    + points);

         }

     }