Question

(1) Create two files to submit:

• Song.java - Class definition
• MainClass.java - Contains main() method

(2) Build the Song class in Song.java with the following specifications:

• Private fields

  String songTitle

  String songArtist

  int secDuration

• Initialize String fields to "Not defined" and numeric to 0.

• Create overloaded constructor to allow passing of 1 argument (title), 2 (title, artist) and 3 arguments (title, artist, duration).

• Create public member method printSongInfo () with output formatted as below:

  Title: Born in the USA

  Artist: Bruce Springsteen

  Duration: 300 sec

(3) In MainClass.java create main() and program logic as below:

• Declare an ArrayList (e.g. Playlist) whose elements are objects of class Song

• Create 5 objects of class Song using overloaded constructor, as below:

  Song 1: pass only title "Hey Jude"

  Song 2: pass title and artist: "Jumping Jack Flash" and "Rolling Stones"

  Song 3,4 and 5: pass title, artist and duration:

  "Before I cry", "Lady Gaga", 300

  "Only the lonely", "Roy Orbison", 180

  ""Born in the USA" , "Bruce Springsteen", 300

• Add 5 songs to the list, as below (using ArrayList methods):

• Print the contests of the ArrayList (Playlist). Use printSongInfo () extractor method in a loop.

Answer 1

public class MainClass { ULUI // Song class 7e static class Song { private String songTitle; private String songArtist; private int secDuration; Title: Hey jude Artist: Not defined Duration: 0 sec Title: Jumping Jack Flash Artist: Rolling Stones Duration: 0 sec Title: Before I cry Artist: Lady Gaga Duration: 300 sec Title: Only the lonely Artist: Roy Orbison Duration: 180 sec Title: Born in the USA Artist: Bruce Springsteen Duration: 300 sec UI ULU public Song (String songTitle, String songArtist, int secDuration) { this.songTitle = songTitle; this.songArtist = songArtist; this.secDuration = secDuration; public Song (String songTitle) { this( songTitle, "Not defined", 0); public Song (String songTitle, String songArtist) { this(songTitle, songArtist, 0); U+U public void printSongInfo () { System.out.println("Title: " +songTitle); System.out.println("Artist: " +songArtist); System.out.println("Duration: "+secDuration + " sec"); public static void main(String[] args) { ArrayList<Song> playlist = new ArrayList<>(); playlist.add(new Song("Hey jude")); playlist.add(new Song("Jumping Jack Flash", "Rolling Stones")); playlist.add(new Song ("Before I cry", "Lady Gaga", 300)); playlist.add(new Song ("Only the lonely", "Roy Orbison", 180)); playlist.add(new Song("Born in the USA", "Bruce Springsteen", 300)); for(Song s: playlist) { s.printSongInfo();

import java.util.ArrayList;

class Song {
        private String songTitle;
        private String songArtist;
        private int secDuration;

        public Song(String songTitle, String songArtist, int secDuration) {
                this.songTitle = songTitle;
                this.songArtist = songArtist;
                this.secDuration = secDuration;
        }

        public Song(String songTitle) {
                this(songTitle, "Not defined", 0);
        }

        public Song(String songTitle, String songArtist) {
                this(songTitle, songArtist, 0);
        }
        
        public void printSongInfo () {
                System.out.println("Title: " +songTitle);
                System.out.println("Artist: " +songArtist);
                System.out.println("Duration: " +secDuration + " sec");
        }
}

public class MainClass {

        public static void main(String[] args) {
                
                ArrayList<Song> playlist = new ArrayList<>();
                playlist.add(new Song("Hey jude"));
                playlist.add(new Song("Jumping Jack Flash", "Rolling Stones"));
                playlist.add(new Song("Before I cry", "Lady Gaga", 300));
                playlist.add(new Song("Only the lonely", "Roy Orbison", 180));
                playlist.add(new Song("Born in the USA", "Bruce Springsteen", 300));
                
                for(Song s: playlist) {
                        s.printSongInfo();
                }
        }

}

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