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);

     }

 }