I have a program that will ask the user which songs they want to play out of a list of available songs and after the user selects one once the song finishes it asks the user which song they want to play again. I have been told to use line listener for this but I can't seem to figure out how to even after using the oracle docs
my code
public class Main {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
String[] pathnames;
File MusicFileChosen;
String musicDir;
boolean songComplete = false;
pathnames = ProgramMap.musicDir.list();
// Print the names of files and directories
for (int ListNum = 0; ListNum < pathnames.length; ListNum++) {
System.out.println(ListNum + 1 + ". " + pathnames[ListNum]);
}
for (int playlistLength = 0; playlistLength < pathnames.length; playlistLength++){
if (!songComplete) {
System.out.println("Which Song would you like to play?");
int musicChoice = input.nextInt();
musicDir = ProgramMap.userDir + "\\src\\Music\\" + pathnames[musicChoice - 1];
MusicFileChosen = new File(musicDir);
PlaySound(MusicFileChosen, pathnames[musicChoice - 1]);
}
}
}
public static void PlaySound(File sound, String FileName){
try{
// Inits the Audio System
Clip clip = AudioSystem.getClip();
AudioInputStream AudioInput = AudioSystem.getAudioInputStream(sound);
//Finds and accesses the clip
clip.open(AudioInput);
//Starts the clip
clip.start();
System.out.println("Now Playing " + FileName);
clip.drain();
}catch (Exception e){
System.out.println("Error playing music");
}
} }
Basically one thing which you need to change is to replace this:
for (int playlistLength = 0; playlistLength < pathnames.length; playlistLength++){
to something like:
while (true) {
System.out.println("Which Song would you like to play?");
int musicChoice = input.nextInt();
musicDir = ProgramMap.userDir + "\\src\\Music\\" + pathnames[musicChoice - 1];
MusicFileChosen = new File(musicDir);
PlaySound(MusicFileChosen, pathnames[musicChoice - 1]);
}
You can add some logic to break the loop.
Also, I would recommend changing a little bit PlaySound method:
public static void PlaySound(File sound, String FileName) {
try (final AudioInputStream in = getAudioInputStream(sound)) {
final AudioFormat outFormat = getOutFormat(in.getFormat());
Info info = new Info(SourceDataLine.class, outFormat);
try (final SourceDataLine line =
(SourceDataLine) AudioSystem.getLine(info)) {
if (line != null) {
line.open(outFormat);
line.start();
System.out.println("Now Playing " + FileName);
stream(getAudioInputStream(outFormat, in), line);
line.drain();
line.stop();
}
}
} catch (UnsupportedAudioFileException
| LineUnavailableException
| IOException e) {
System.err.println("Error playing music\n" + e.getMessage());
}
}
private static AudioFormat getOutFormat(AudioFormat inFormat) {
final int ch = inFormat.getChannels();
final float rate = inFormat.getSampleRate();
return new AudioFormat(PCM_SIGNED, rate, 16, ch, ch * 2, rate, false);
}
private static void stream(AudioInputStream in, SourceDataLine line)
throws IOException {
final byte[] buffer = new byte[4096];
for (int n = 0; n != -1; n = in.read(buffer, 0, buffer.length)) {
line.write(buffer, 0, n);
}
}
It needs to play MP3 because you can face such a problem: Unknown frame size.
To add MP3 reading support to Java Sound, add the mp3plugin.jar of the JMF to the run-time classpath of the application. https://www.oracle.com/technetwork/java/javase/download-137625.html