challenge exercise consider how you might play multiple tracks in random order. would you want to make sure that all tracks are played equally or prefered favorite tracks? How might a "play count" field in the Track class help wtih this task? This is queston 4.43 in Chapter 4 of Objects First With Java: A Practical Introduction Using BlueJ (5th Edition). I am having trouble solving it and am wondering how I would complete this exercise. Here is the track class:

/** * Store the details of a music track, * such as the artist, title, and file name. * * @author David J. Barnes and Michael Klling * @version 2011.07.31 */ public class Track { // The artist. private String artist; // The track's title. private String title; // Where the track is stored. private String filename; /** * Constructor for objects of class Track. * @param artist The track's artist. * @param title The track's title. * @param filename The track file. */ public Track(String artist, String title, String filename) { setDetails(artist, title, filename); } /** * Constructor for objects of class Track. * It is assumed that the file name cannot be * decoded to extract artist and title details. * @param filename The track file. */ public Track(String filename) { setDetails("unknown", "unknown", filename); } /** * Return the artist. * @return The artist. */ public String getArtist() { return artist; } /** * Return the title. * @return The title. */ public String getTitle() { return title; } /** * Return the file name. * @return The file name. */ public String getFilename() { return filename; } /** * Return details of the track: artist, title and file name. * @return The track's details. */ public String getDetails() { return artist + ": " + title + " (file: " + filename + ")"; } /** * Set details of the track. * @param artist The track's artist. * @param title The track's title. * @param filename The track file. */ private void setDetails(String artist, String title, String filename) { this.artist = artist; this.title = title; this.filename = filename; } }