AudioContent

package Lesson_3_4.Lesson_3_Task_1;

public class AudioContent {
    private byte [] content;

    public AudioContent (byte[]content){
        this.content = content;
    }

    public byte[] getContent(){
        return content;
    }

    @Override
    public String toString() {
        return "AudioContent{" +
                "content=" + content +
                '}';
    }
}

MusicRunner

package Lesson_3_4.Lesson_3_Task_1;

public class MusicRunner {
    public static void main(String[] args) {

        Song firtsong = new Song("The Madness", "Alevela", "Pop Punk", 3,
                new AudioContent(new byte[]{1}));
        Song secondsong = new Song("The Criminal", "Unions", "Rock", 4,
                new AudioContent(new byte[]{2}));
        Song thirdsong = new Song("Man", "Sam Tinnesz", "Pop", 3,
                new AudioContent(new byte[]{3}));
        Song fourthsong = new Song("You can run", "Adam Jones", "Rock", 4,
                new AudioContent(new byte[]{4}));
        Song fifthsong = new Song("Changes", "Souls harbor", "Easy listening", 3,
                new AudioContent(new byte[]{5}));
        Song sixthsong = new Song("Get Up", "Shim", "Pop Punk", 5,
                new AudioContent(new byte[]{6}));

        String a = firtsong.getTitle();
        long b = fifthsong.getLength();
        String c = firtsong.getGenre();

        System.out.println(a); // The Madness
        System.out.println(b); // 3
        System.out.println(c); // Pop Punk

        Playlist playlist1 = new Playlist("run");
        Playlist playlist2 = new Playlist("walk");

        playlist1.addsong(firtsong);
        playlist1.addsong(secondsong);
        playlist1.addsong(thirdsong);

        playlist2.addsong(fourthsong);
        playlist2.addsong(fifthsong);
        playlist2.addsong(sixthsong);

        String z = playlist1.getTitle();
        System.out.println(z); // run

        long x = playlist2.getTotalLength();
        System.out.println(x); // 12

        System.out.println(playlist1.findByTitlePart("The Criminal"));
        // [Song{title='The Criminal', author='Unions', genre='Rock', length=4,
        // content=AudioContent{content=[B@3b81a1bc}}]

        System.out.println(playlist1.findByAuthor("Alevela"));
        // [Song{title='The Madness', author='Alevela', genre='Pop Punk', length=3,
        // content=AudioContent{content=[B@64616ca2}}]

        User black = new User("white");

        black.addSongToPlaylist("run", sixthsong);

        System.out.println(playlist2.findByAuthor("Shim")); // [Song{title='Get Up', author='Shim', genre='Pop Punk',
        // length=5, content=AudioContent{content=[B@4e04a765}}]


    }
}

Playlist

package Lesson_3_4.Lesson_3_Task_1;

import java.lang.reflect.Array;
import java.util.ArrayList;

public class Playlist {
    private String title;
    private ArrayList <Song> songs = new ArrayList<>();

    public Playlist(String title){
        this.title = title;
    }

    public String getTitle() {
        return title;
    }

    public void addsong (Song song){
        songs.add(song);
    }

    public long getTotalLength(){
        long length = 0;
        for (Song song : songs){
            length = (length + song.getLength());
        }
        return length;
    }

    public ArrayList <Song> findByTitlePart (String title){
        ArrayList <Song> searchingsong = new ArrayList<>();
        for (Song song : songs){
            if (song.getTitle() == title){
                searchingsong.add(song);
            }
        }
        return searchingsong;
    }

    public ArrayList <Song> findByAuthor (String author){
        ArrayList <Song> searchingsong = new ArrayList<>();
        for (Song song : songs){
            if (song.getAuthor() == author){
                searchingsong.add(song);
            }
        }
        return searchingsong;
    }

    @Override
    public String toString() {
        return "Playlist{" +
                "title='" + title + '\'' +
                ", songs=" + songs +
                '}';
    }
}

Song

package Lesson_3_4.Lesson_3_Task_1;

public class Song {
    private String title;
    private String author;
    private String genre;
    private int length;
    private AudioContent content;

    public Song (String title, String author, String genre, int length, AudioContent content) {
        this.title = title;
        this.author = author;
        this.genre = genre;
        this.length = length;
        this.content = content;

    }

    public String getTitle() {
        return title;
    }

    public String getAuthor() {
        return author;
    }

    public String getGenre() {
        return genre;
    }

    public int getLength () {
        return length;
    }

    public AudioContent getContent () {
        return content;
    }

    @Override
    public String toString() {
        return "Song{" +
                "title='" + title + '\'' +
                ", author='" + author + '\'' +
                ", genre='" + genre + '\'' +
                ", length=" + length +
                ", content=" + content +
                '}';
    }
}

User

package Lesson_3_4.Lesson_3_Task_1;

import java.util.ArrayList;

public class User {
    private String name;
    private ArrayList<Playlist> playlists = new ArrayList<>();

    public User(String name) {
        this.name = name;
    }

    public String getName (){
        return name;
    }

    public Playlist createPlaylist (String newPlaylist){
        Playlist playlist = new Playlist(newPlaylist);
        playlists.add(playlist);
        return playlist;
    }

    public Playlist findByTitle (String title){
        Playlist searchplaylist = new Playlist(title);
        for (Playlist playlist : playlists ){
            if (title == playlist.getTitle()){
                searchplaylist = playlist;
            }
        }
        return searchplaylist;

    }

    public void addSongToPlaylist (String playlisttitle, Song song){
        for (Playlist playlist : playlists){
            if (playlist.getTitle() == playlisttitle){
                playlist.addsong(song);
            }
        }

    }

    @Override
    public String toString() {
        return "User{" +
                "name='" + name + '\'' +
                ", playlists=" + playlists +
                '}';
    }
}