NullPointerException whe reading audio from JAR - java

I tried to make a runnable JAR, but for some reason I couldn't get my game to play. I did some research and ran it through my command prompt to try to find the error and I got this below. So obviously I know the issue I just need to fix it. I am new to programming so not quite sure what this is telling me.
Exception in thread "main" java.lang.NullPointerException
at java.base/java.util.Objects.requireNonNull(Unknown Source)
at java.desktop/javax.sound.sampled.AudioSystem.getAudioInputStream(Unknown Source)
at builder.AudioPlayer.playMenuSound(AudioPlayer.java:20)
at builder.Game.<init>(Game.java:56)
at builder.Game.main(Game.java:61)
package builder;
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;
public class AudioPlayer {
private static Clip play;
public static void playMenuSound()
{
try {
//AudioInputStream menuSound = AudioSystem.getAudioInputStream(new File("src/res/introSong.wav")); //Take in audio from res folder
AudioInputStream menuSound = AudioSystem.getAudioInputStream(AudioPlayer.class.getClassLoader().getResourceAsStream("res/introSong.wav"));
play = AudioSystem.getClip(); //
play.open(menuSound); //Play the sound
FloatControl volume = (FloatControl) play.getControl(FloatControl.Type.MASTER_GAIN); //Get control of volume
volume.setValue(1.0f); //0.0 - 1.0 volume
play.loop(Clip.LOOP_CONTINUOUSLY); //Loop once clip is over
}catch (LineUnavailableException | IOException | UnsupportedAudioFileException e){
e.printStackTrace();
}
}
public static void playGameSound()
{
try {
//AudioInputStream gameSound = AudioSystem.getAudioInputStream(new File("src/res/inGame.wav")); //Take in audio from res folder
AudioInputStream gameSound = AudioSystem.getAudioInputStream(AudioPlayer.class.getClassLoader().getResourceAsStream("res/inGame.wav"));
play = AudioSystem.getClip(); //
play.open(gameSound); //Play the sound
FloatControl volume = (FloatControl) play.getControl(FloatControl.Type.MASTER_GAIN); //Get control of volume
volume.setValue(0.5f); //0.0 - 1.0 volume
play.loop(Clip.LOOP_CONTINUOUSLY); //Loop once clip is over
}catch (LineUnavailableException | IOException | UnsupportedAudioFileException e){
e.printStackTrace();
}
}
public static void stopMusic()
{
play.close(); //Stop music
}
}

Your sound file inGame.wav is located in a directory res inside your source directory.
When you export it, the sources will be compiled and copied to the JAR.
This results in the sound file being in a subdirectory res inside the JAR.
You try to read the file inGame.wav but you have to read res/inGame.wav instead.
The second problem is that the system cannot set markers on the InputStream. This can be solved by changing getResourceAsStream to getResource().
AudioInputStream menuSound = AudioSystem.getAudioInputStream(AudioPlayer.class.getClassLoader().getResource("res/inGame.wav"));

Related

Java Eclipse exporting game with source folder

i'm trying to export my game with bunch of music. when i exported game with music(file size is 300mb(resources folder is about 300 mb size))
when i run the jar then i hear no sound. i tried with cmd it shows following error:
Any Help?
Edit
SoundManager Class:
package com.memequickie.sound;
import java.io.File;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
public class SoundManager {
Clip clip;
public boolean playSound(File sound) {
boolean ended = false;
try {
clip = AudioSystem.getClip();
clip.open(AudioSystem.getAudioInputStream(sound));
clip.start();
if(clip.getMicrosecondLength() == clip.getMicrosecondPosition())
{
ended = true;
}
} catch(Exception e) {
System.out.println("Error with playing sound.");
e.printStackTrace();
}
return ended;
}
public void stopSound() {
clip.stop();
}
}
Edit
I tried inputstream and still can't get it to working.
AudioSystem.getAudioInputStream(File) expects Music6.wav as a real file, not as a zipped file inside the JAR.
If you want to ship your audio files inside the JAR, you have to use AudioSystem.getAudioInputStream(InputStream) with the audio file as InputStream wrapped in a BufferedInputStream instead.

In Java playing back audio using a clip isn't working with no error messages

I've been trying to use the "Trail: Sound" from Oracle and I've gotten to this part. https://docs.oracle.com/javase/tutorial/sound/playing.html#113609
"Using a Clip"
Well I tried to follow the directions which aren't exactly specific and I made some code that seems like it should work. It basically matches examples I found online that work for other people. On my machine nothing happens the program ends without playing any sound right after I start it. It doesn't say any errors.
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Line;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.Clip;
import javax.sound.sampled.AudioFormat;
import java.io.File;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.UnsupportedAudioFileException;
import java.io.IOException;
import javax.sound.sampled.AudioInputStream;
class Demo{
public static void main(String[] args) throws LineUnavailableException, UnsupportedAudioFileException, IOException{
File file = new File("song1.wav");
AudioFileFormat audioFileFormat = AudioSystem.getAudioFileFormat(file);
AudioFormat audioFormat = audioFileFormat.getFormat();
javax.sound.sampled.DataLine.Info dataLineInfo = new javax.sound.sampled.DataLine.Info(Clip.class,audioFormat);
Line theLine = AudioSystem.getLine(dataLineInfo);
Clip clip = (Clip)theLine;
AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(file);
clip.open(audioInputStream);
clip.start();
}
}
EDIT: I figured out after clip.start() I needed to keep the program open.
I use that class to play MP# sounds and works for me
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import javazoom.jl.player.Player;
import monitorbixao.Main;
/**
*
* #author C007329
*/
public class MusicPlayer extends Thread {
private File music;
private Player player;
public MusicPlayer(File music) {
this.music = music;
}
#Override
public void run() {
play();
}
public void play() {
try {
FileInputStream stream = new FileInputStream(music);
BufferedInputStream buffer = new BufferedInputStream(stream);
this.player = new Player(buffer);
//System.out.println("Executando...");
this.player.play();
//System.out.println("Terminado");
} catch (Exception e) {
//System.out.println("Erro!");
Main.logApp.addMsgLog(MusicPlayer.class.getCanonicalName(), e.getMessage());
e.printStackTrace();
}
}
public void close() {
this.player.close();
//System.out.println("Interrompido...");
}
}
I figured it out. I needed to keep the program open so after "clip.start();" I added this code
java.io.Console c = System.console();
if (c == null) {
System.err.println("No console.");
System.exit(1);
}
String nothing = c.readLine("Wait... ");
:D

How to play a sound in java from the millisecond X

I have a problem, I wanna play a sound (or music file) for example from the second 10 to the 12, it is possible to make an function like soundObject.play(10000,12000); ?
actually i'm testing sound classes but I only can play, stop and loop
Thank you!
I finally found the answer, this is the code I used to
play the 3-5 seconds
import java.io.IOException;
import java.net.URL;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;
public class SoundClipTest{
public static void main(String[] args) throws UnsupportedAudioFileException, IOException, LineUnavailableException {
URL myURL= ClassLoader.getSystemResource("abesti.wav");
AudioInputStream audio = AudioSystem.getAudioInputStream(myURL);
Clip clip = AudioSystem.getClip();
clip.open(audio);
clip.setMicrosecondPosition(3000000);
clip.start();
try {
Thread.sleep(2000); //in milliseconds
} catch (InterruptedException e) {
e.printStackTrace();
}
clip.stop();
}
}

Audio recorder problem in java

I have a problem while recording the audio. I created a servlet and I modified the java sound API demo code to some extent and finally I can record the audio. The problem is that when I play the audio I can see the total time of the audio stored as 645.45 or something like that, but I have been recording the audio only for a couple of mins. One more problem is the audio is getting saved in the Eclipse directory instead of the project directory.
This is the servlet code.
package com;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.Clip;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.TargetDataLine;
public class SoundRecorder extends HttpServlet {
private static final long serialVersionUID = 1L;
static protected boolean running;
static ByteArrayOutputStream out;
double fileName = Math.random();
//strFilename = nowLong.toString();
public SoundRecorder() {
System.out.println("Filename will be..." + fileName + ".wav");
}
public void init() {
}
public void destroy() {
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println("call received..");
String method = request.getParameter("method");
System.out.println(method);
if("record".equalsIgnoreCase(method)) {
captureAudio(true);
}
else if("stop".equalsIgnoreCase(method)) {
captureAudio(false);
}
else if("play".equalsIgnoreCase(method)) {
System.out.println("yet to write");
playAudio();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println("call received..");
String method = request.getParameter("method");
System.out.println(method);
doGet(request, response);
}
private void captureAudio(boolean capturing) {
File outputFile = new File(fileName + ".wav");
AudioFormat audioFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,44100.0F, 16, 2, 4, 44100.0F, false);
DataLine.Info info = new DataLine.Info(TargetDataLine.class, audioFormat);
TargetDataLine targetDataLine = null;
try
{
targetDataLine = (TargetDataLine) AudioSystem.getLine(info);
targetDataLine.open(audioFormat);
}
catch (LineUnavailableException e)
{
System.out.println("unable to get a recording line");
e.printStackTrace();
System.exit(1);
}
AudioFileFormat.Type targetType = AudioFileFormat.Type.WAVE;
final Recorder recorder = new Recorder(targetDataLine,targetType,outputFile);
System.out.println("Recording...");
if(capturing){
recorder.start();
}
else {
recorder.stopRecording();
}
}
private void playAudio() {
try {
File file = new File(fileName + ".wav");
AudioInputStream stream = AudioSystem.getAudioInputStream(file);
AudioFormat format = stream.getFormat();
DataLine.Info info = new DataLine.Info(Clip.class, stream.getFormat());
Clip clip = (Clip) AudioSystem.getLine(info);
clip.open(stream);
clip.start();
} catch (Exception e) {
System.err.println("Line unavailable: " + e);
System.exit(-4);
}
}
}
And this is the recorder class
public class Recorder extends Thread {
private TargetDataLine m_line;
private AudioFileFormat.Type m_targetType;
private AudioInputStream m_audioInputStream;
private File m_outputFile;
public Recorder(TargetDataLine line,
AudioFileFormat.Type targetType,
File file)
{
m_line = line;
m_audioInputStream = new AudioInputStream(line);
m_targetType = targetType;
m_outputFile = file;
}
/** Starts the recording.
To accomplish this, (i) the line is started and (ii) the
thread is started.
*/
public void start()
{
m_line.start();
super.start();
}
/** Stops the recording.
*/
public void stopRecording()
{
m_line.stop();
m_line.close();
}
/** Main working method.
*/
public void run()
{
try
{
AudioSystem.write(
m_audioInputStream,
m_targetType,
m_outputFile);
}
catch (IOException e)
{
e.printStackTrace();
}
}
private static void closeProgram()
{
System.out.println("Program closing.....");
System.exit(1);
}
private static void out(String strMessage)
{
System.out.println(strMessage);
}
}
When developing with servlets, you need to realize that there's only one servlet instance throughout the whole webapp's lifetime, from startup until shutdown. So, the HTTP requests from all visitors, all sessions, all browser windows/tabs, etc will all share the same servlet instance. Also, when you make a variable static, it will be shared among all instances of the same class (which is not really relevant here since there's only one servlet instance anyway).
In other words, those variables which you've declared in the servlet are not threadsafe:
static protected boolean running;
static ByteArrayOutputStream out;
double fileName = Math.random();
There's only one of them and they are used by all visitors simultaneously. For the first two variables, which are continuously modified, this will lead to major threadsafety problems and for the third variable this means that all visitors record to the very same file. You need to declare them inside the doGet() block. You'd like to store the recording in the session by an unique request based token as key and then pass that key to the subsequent requests.
As to the problem of the file being saved at the unexpected location; when you use relative paths in java.io.File in a servlet, then it will be relative to the directory from where the webserver is started. If you start it from inside Eclipse, then it's saved in Eclipse directory. You'd like to use absolute path in java.io.File instead. If your intent is to save it in public webcontent (there where your JSP's and the /WEB-INF folder is located), then you need ServletContext#getRealPath() to convert a web path to an absolute disk path.
String relativeWebPath = "filename.ext";
String absoluteDiskPath = getServletContext().getRealPath(relativeWebPath);
File file = new File(absoluteDiskPath);
There's however another problem with this: all files will get erased whenever you redeploy the webapp. If you want a bit more permanent storage, then you'd like to store it outside the web project. E.g. C:/path/to/recordings.
File file = new File("C:/path/to/recordings/filename.ext");

how to play wav file in java 1.4

as title
How can i play a sound file repeatedly in java v1.4?
If you just want to play the wav file then 'org.life.java''s answer is correct. For other format types you can use JMF( http://www.oracle.com/technetwork/java/javase/tech/index-jsp-140239.html ).
Note: JMF is obsolete now... But it will work with jdk 1.4
import java.net.URL;
import javax.sound.sampled.*;
public class LoopSound {
public static void main(String[] args) throws Exception {
URL url = new URL(
"http://pscode.org/media/leftright.wav");
Clip clip = AudioSystem.getClip();
AudioInputStream ais = AudioSystem.
getAudioInputStream( url );
clip.open(ais);
clip.loop(0);
javax.swing.JOptionPane.
showMessageDialog(null, "Close to exit!");
}
}
This will work in JDK 1.4 (tested in Windows XP and JDK 1.4.2_06).
The other answer fails because as correctly stated in the comments, AudioSystem.getClip() does not exist on JDK 1.4. Below is a complete source (in the form of a main function, but it's adaptable to anything else) that uses DataLine and plays in a separate Thread for better overall performance as well:
import java.io.File;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.SourceDataLine;
public class AudioTest {
public static void main(String[] args) throws Exception {
AudioInputStream ais = AudioSystem.getAudioInputStream(new File("C:/sound1.wav"));
AudioFormat format = ais.getFormat();
DataLine.Info dataLineInfo = new DataLine.Info(SourceDataLine.class, format);
SourceDataLine sourceDataLine = (SourceDataLine) AudioSystem.getLine(dataLineInfo);
class PlayThread extends Thread {
private AudioInputStream ais;
private AudioFormat format;
private SourceDataLine sourceDataLine;
byte tempBuffer[] = new byte[10000];
public PlayThread(AudioInputStream ais, SourceDataLine sourceDataLine, AudioFormat format) {
this.ais = ais;
this.sourceDataLine = sourceDataLine;
this.format = format;
}
public void run() {
try {
sourceDataLine.open(this.format);
sourceDataLine.start();
int cnt;
while ((cnt = this.ais.read(tempBuffer, 0, tempBuffer.length)) != -1) {
if (cnt > 0) {
sourceDataLine.write(tempBuffer, 0, cnt);
}
}
sourceDataLine.drain();
sourceDataLine.close();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
new PlayThread(ais, sourceDataLine, format).start();
}
}
Both question and answers are really old, but I just had to make this work on a fanless mini PC that only run windows XP so... ¯\_(ツ)_/¯

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