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enseitankad0/70_linkedListChallenge_Kamil_.idea_description.html

Created March 31, 2018 20:28
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ListIterator Playlist [Java]
Raw
70_linkedListChallenge_Kamil_.idea_description.html
<html>Simple <b>Java</b> application that includes a class with <code>main()</code> method</html>
Raw
70_linkedListChallenge_Kamil_.idea_misc.xml
<?xml version="1.0" encoding="UTF-8"?>
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</project>
Raw
70_linkedListChallenge_Kamil_.idea_modules.xml
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectModuleManager">
<modules>
<module fileurl="file://$PROJECT_DIR$/70_linkedListChallenge_Kamil.iml" filepath="$PROJECT_DIR$/70_linkedListChallenge_Kamil.iml" />
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</project>
Raw
70_linkedListChallenge_Kamil_.idea_project-template.xml
<template>
<input-field default="com.company">IJ_BASE_PACKAGE</input-field>
</template>
Raw
70_linkedListChallenge_Kamil_.idea_workspace (Kopia powodująca konflikty (użytkownik KamilPc2018) 2018-03-28).xml
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Raw
70_linkedListChallenge_Kamil_70_linkedListChallenge_Kamil.iml
<?xml version="1.0" encoding="UTF-8"?>
<module type="JAVA_MODULE" version="4">
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</module>
Raw
70_linkedListChallenge_Kamil_src_com_eneseitankad0_Album.java
package com.eneseitankad0;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
public class Album {
LinkedList<Song> albumList = new LinkedList<>();
private String name;
private String artist;
// konstruktor Albumu
public Album(String name, String artist) {
this.artist = artist;
this.name = name;
System.out.println("New album added");
}
public LinkedList<Song> getAlbumList() {
return albumList;
}
public void setAlbumList(LinkedList<Song> albumList) {
this.albumList = albumList;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
//dodawanie piosenki do albumu
public void addSong(String name, int duration) {
albumList.add(new Song(name, duration));
System.out.println("new song " + name + ": " + duration + "s" + " added to album " + this.name);
}
public void getSongsFromInside() {
for (int i = 0; i < this.albumList.size(); i++) {
System.out.println(" " + this.albumList.get(i).getName());
}
}
// to tzw. foreach za pomocą słowa kluczowego for. Po prostu naucz się tej składni.
// Będzie iterowana kolekcja this.songs, każdy element z niej będzie typu Song i
// zostanie umieszczony w zmiennej checkedSong.
// Sam znak dwukropka nie ma szczególnego znaczenia, jest nieodłączną częścią
// foreacha tak jak średniki są nieodłączną częścią zwykłego fora.
private Song findSong(String name) {
for (Song checkedSong : this.albumList) {
if (checkedSong.getName().equals(name)) {
return checkedSong;
}
}
return null;
}
public boolean addToPlaylist(int trackNumber, LinkedList<Song> playlist) {
int index = trackNumber - 1;
if ((index > 0) && (index <= this.albumList.size())) {
playlist.add(this.albumList.get(index));
return true;
}
System.out.println("this album does not contain track no: " + trackNumber);
return false;
}
//LinkedList<Song> playlist
public boolean addToPlaylist(String songTittle, LinkedList<Song> playlist) {
Song checkedSong = findSong(songTittle);
if (checkedSong != null) {
playlist.add(checkedSong);
System.out.println("Song " + songTittle + " added to playlist");
return true;
}
System.out.println("Can not find song");
return false;
}
}
Raw
70_linkedListChallenge_Kamil_src_com_eneseitankad0_Main.java
package com.eneseitankad0;
// Create a program that implements a playlist for songs
// Create a Song class having Title and Duration for a song.
// The program will have an Album class containing a list of songs.
// The albums will be stored in an ArrayList
// Songs from different albums can be added to the playlist and will appear in the list in the order
// they are added.
// Once the songs have been added to the playlist, create a menu of options to:-
// Quit,Skip forward to the next song, skip backwards to a previous song. Replay the current song.
// List the songs in the playlist
// A song must exist in an album before it can be added to the playlist (so you can only play songs that
// you own).
// Hint: To replay a song, consider what happened when we went back and forth from a city before we
// started tracking the direction we were going.
// As an optional extra, provide an option to remove the current song from the playlist
// (hint: listiterator.remove()
// classes: Album -> to arraylist
//menu: quit,skip,>>, <<, replay, listen,
//import sun.awt.image.ImageWatched;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.ListIterator;
import java.util.Scanner;
public class Main {
private static LinkedList<Album> albums = new LinkedList<>(); // PRIVATE STATIC
// ^ NON STATIC FIELD ALBUMS CAN NOT BE REFERENCE FROM A STATIC CONTEX
public static void main(String[] args) {
// ADDING SONGS
Album album = new Album("Kill Em All", "ACDC");
album.addSong("Seek & Destory", 12);
album.addSong("Ride The Lightin", 13);
album.addSong("Seek & Destory", 14);
albums.add(album);
album = new Album("Death Magnectis", "Metallica");
album.addSong("The Day That Never Comes", 123);
album.addSong("All NIghtmare Long", 123);
album.addSong("Blood and scared", 123);
albums.add(album);
//printListAlbum(albums);
printEverything(albums);
LinkedList<Song> playlist = new LinkedList<Song>();
albums.get(0).addToPlaylist("Seek & Destory", playlist);
albums.get(0).addToPlaylist(2, playlist);
albums.get(1).addToPlaylist(2, playlist);
printListPlaylist(playlist);
play(playlist);
}
public static void play(LinkedList<Song> playlist) {
Scanner scanner = new Scanner(System.in);
boolean forward = true;
boolean isQuit = false;
ListIterator<Song> listIterator = playlist.listIterator();
// ListIterator<Song> listIterator = playList.listIterator();
if (playlist.size() == 0) {
System.out.println("NO SONG IN PLAYLIST");
return;
} else {
System.out.println("NOW PLAYING " + listIterator.next().toString());
printMenu();
}
while (!isQuit) {
int choose = scanner.nextInt();
scanner.nextLine();
// 0 - to quit
// 1 - to play next song
// 2 - to play previous song
// 3 - to replay the current song
// 4 - list songs in the playlist
// 5 - print available actions.
// 6 - delete current song from playlist
switch (choose) {
case 0:
System.out.println("Playlist is Done");
isQuit = true;
break;
case 1: // PLAY NEXT SONG
if (!forward) { // domyslnie true
if (listIterator.hasNext()) { //jestesmy w pozycji 0 i sprawdzamy czy jest cos dalej
listIterator.next(); // przenosimy ^ wskaznik iteratora dalej
}
forward = true; // kierunek zostaje --->
}
if (listIterator.hasNext()) { // sprawadzamy czy jest cos dalej
System.out.println("Now playing " + listIterator.next().toString()); // gramy to co jest dalej(?)
} else { // jesli nie ma nic dalej
System.out.println("We have reached the end of the playlist");
forward = false;
}
break;
case 2: // PLAY PREVIOUS SONG
if (forward) { // moze byc true or false
if (listIterator.hasPrevious()) { // analogicznie do next
listIterator.previous();
}
forward = false;
}
if (listIterator.hasPrevious()) { // cofamy sie i puszczamy to co bylo wcześniej
System.out.println("Now playing " + listIterator.previous().toString());
} else { // jesli nie ma nic, nie da sie cofnac
System.out.println("We are at the start of the playlist");
forward = true;
}
break;
case 3: // REPLAY CURRENT SONG
if (forward) { // moze byc true or false
// czyli jesli jest cos wstecz to powtarzamy, a jesli nie to ostatnia znana piosenke
if (listIterator.hasPrevious()) {
System.out.println("Now replaying " + listIterator.previous().toString());
forward = false;
} else {
System.out.println("We are at the start of the list");
}
} else {
if (listIterator.hasNext()) {
System.out.println("Now replaying " + listIterator.next().toString());
forward = true;
} else {
System.out.println("We have reached the end of the list");
}
}
break;
case 4: // PRINT PLAYLIST
printListPlaylist(playlist);
break;
case 5: // PRINT THIS MENU
printMenu();
break;
case 6: // DELETE CURRENT SONG
if (playlist.size() > 0) {
listIterator.remove();
if (listIterator.hasNext()) {
System.out.println("Now playing " + listIterator.next());
} else if (listIterator.hasPrevious()) {
System.out.println("Now playing " + listIterator.previous());
}
}
break;
}
}
}
// method to print everything what is storaged in albums LinkedList (everything you've added)
public static void printEverything(LinkedList<Album> linkedList) {
System.out.println("=============================");
// System.out.println("List of song in album: " + albumName);
Iterator<Album> i = linkedList.iterator(); // coś jak for (int i = 0; i < linkedList.size(); i++ )
int j = 0;
while (i.hasNext()) {
j++;
Album currentAlbum = i.next();
System.out.println(j + ": " + currentAlbum.getName());
currentAlbum.getSongsFromInside();
}
System.out.println("=============================");
}
// method to print everything what is storaged in Album LinkedList (everything you've added to Album)
public static void printListAlbum(LinkedList<Album> linkedList) {
System.out.println("=============================");
// System.out.println("List of song in album: " + albumName);
Iterator<Album> i = linkedList.iterator(); // coś jak for (int i = 0; i < linkedList.size(); i++ )
int j = 0;
while (i.hasNext()) {
j++;
Album currentAlbum = i.next();
System.out.println(j + ": " + currentAlbum.getName());
}
System.out.println("=============================");
}
public static void printListPlaylist(LinkedList<Song> playlist) {
System.out.println("============ playlist =================");
// System.out.println("List of song in album: " + albumName);
Iterator<Song> i = playlist.iterator(); // coś jak for (int i = 0; i < playlist.size(); i++ )
int j = 0;
while (i.hasNext()) {
j++;
Song currentSong = i.next();
System.out.println(j + ": " + currentSong.getName());
}
System.out.println("=============================");
}
private static void printMenu() {
System.out.println("Available actions:\npress");
System.out.println("0 - to quit\n" +
"1 - to play next song\n" +
"2 - to play previous song\n" +
"3 - to replay the current song\n" +
"4 - list songs in the playlist\n" +
"5 - print available actions.\n" +
"6 - delete current song from playlist");
}
}
Raw
70_linkedListChallenge_Kamil_src_com_eneseitankad0_Song.java
package com.eneseitankad0;
public class Song {
private String name;
private int duration; // duration in seconds
public Song(String name, int duration) {
this.name = name;
this.duration = duration;
// System.out.println("new song added: " + name + " / " + duration);
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getDuration() {
return duration;
}
public void setDuration(int duration) {
this.duration = duration;
}
@Override
public String toString() {
return this.name + ": " + this.duration;
}
}
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