Chapter 10, Problem 20E

Program Plan Intro

  Given program

    import java.util.ArrayList;

    import java.util.Collections;

    // Declare method TimeSpanDemo

    public class TimeSpanDemo

    {

        public static void main(String[] args)

        {

            //Declare variables

            TimeSpan ts1 = new TimeSpan(3, 15);

            TimeSpan ts2 = new TimeSpan(1, 40);

            TimeSpan ts3 = new TimeSpan(4, 10);

            TimeSpan ts4 = new TimeSpan(2, 50);

            //Declare variable timespans

            ArrayList timeSpans = new ArrayList();

            timeSpans.add(ts1);

            timeSpans.add(ts2);

            timeSpans.add(ts3);

            timeSpans.add(ts4);

            //Print the statement

System.out.println("Time spans in the list before sorting: "    + timeSpans);

            Collections.sort(timeSpans);

            //Print the statement

System.out.println("Time spans in the list after sorting: "    + timeSpans);

        }

    }