Respuesta :
The program based on the information is illustrated.
How to illustrate the program?
import java.util.Scanner;
public class Playlist {
public static void printPlaylist(SongNode songs){
SongNode song = songs.getNext();
while (song!=null) {
song.printSongInfo();
System.out.println();
song = song.getNext();
}
}
public static void main (String[] args) {
Scanner scnr = new Scanner(System.in);
SongNode headNode;
SongNode currNode;
SongNode lastNode;
String songTitle;
int songLength;
String songArtist;
// Front of nodes list
headNode = new SongNode();
lastNode = headNode;
// Read user input until -1 entered
songTitle = scnr.nextLine();
while (!songTitle.equals("-1")) {
songLength = scnr.nextInt();
scnr.nextLine();
songArtist = scnr.nextLine();
currNode = new SongNode(songTitle, songLength, songArtist);
lastNode.insertAfter(currNode);
lastNode = currNode;
songTitle = scnr.nextLine();
}
// Print linked list
System.out.println("LIST OF SONGS");
System.out.println("-------------");
printPlaylist(headNode);
}
}
class SongNode {
private String songTitle;
private int songLength;
private String songArtist;
private SongNode nextNodeRef; // Reference to the next node
public SongNode() {
songTitle = "";
songLength = 0;
songArtist = "";
nextNodeRef = null;
}
// Constructor
public SongNode(String songTitleInit, int songLengthInit, String songArtistInit) {
this.songTitle = songTitleInit;
this.songLength = songLengthInit;
this.songArtist = songArtistInit;
this.nextNodeRef = null;
}
// Constructor
public SongNode(String songTitleInit, int songLengthInit, String songArtistInit, SongNode nextLoc) {
this.songTitle = songTitleInit;
this.songLength = songLengthInit;
this.songArtist = songArtistInit;
this.nextNodeRef = nextLoc;
}
// insertAfter
public void insertAfter(SongNode nodeLoc) {
SongNode tmpNext;
tmpNext = this.nextNodeRef;
this.nextNodeRef = nodeLoc;
nodeLoc.nextNodeRef = tmpNext;
}
// Get location pointed by nextNodeRef
public SongNode getNext() {
return this.nextNodeRef;
}
public void printSongInfo(){
System.out.println("Title: "+this.songTitle);
System.out.println("Length: "+this.songLength);
System.out.println("Artist: "+this.songArtist);
}
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