Jlayer, playing mp3!

**sakonpure6** · December 21st, 2013, 09:35 PM

Hi I downloaded the custom library Jlayer to play a music file, my code has no errors however when I run the program, nothing happens. Why?

public static void main(String[] args) 
{       
    Player player = null;
 
    try 
    {
        FileInputStream fis = new FileInputStream("song.mp3");
        BufferedInputStream bis = new BufferedInputStream(fis);
        player = new Player(bis);
    } 
    catch (Exception e)
    {
        System.out.println(e.getMessage());
    }
 
    try 
    {
        player.play();
    } 
    catch (JavaLayerException e) 
    {
        System.out.println(e.getMessage());
    }   
}

**andbin** · December 22nd, 2013, 10:43 AM

Originally Posted by sakonpure6

Hi I downloaded the custom library Jlayer to play a music file, my code has no errors however when I run the program, nothing happens. Why?

The code technically works (tested, changing just only the filename). Do you have an exception at runtime? Keep in mind that "song.mp3" is relative to the "current" directory. What is your current directory depends on how/from where you launch the application.

**sakonpure6** · December 22nd, 2013, 10:55 AM

Originally Posted by andbin

What is your current directory depends on how/from where you launch the application.

Sorry, I did not understand

, I tried linking the music.mp3 using this method "C:\\Users\\sakonpure6\\Desktop\\Java Projects\\Sounds\res\\music.mp3" still no sound plays? Btw I only added the jar files of jlayer, do I need to install something extra?

**andbin** · December 22nd, 2013, 11:03 AM

Originally Posted by sakonpure6

Sorry, I did not understand

, I tried linking the music.mp3 using this method "C:\\Users\\sakonpure6\\Desktop\\Java Projects\\Sounds\res\\music.mp3" still no sound plays? Btw I only added the jar files of jlayer, do I need to install something extra?

You need only the jlX.X.X.jar that must be in classpath. And if the absolute path of the mp3 is correct, then it's ok.
I repeat the question: do you have an exception at runtime?

**sakonpure6** · December 22nd, 2013, 11:19 AM

Originally Posted by andbin

You need only the jlX.X.X.jar that must be in classpath. And if the absolute path of the mp3 is correct, then it's ok.
I repeat the question: do you have an exception at runtime?

Non at all. The error box in eclipse is empty. Its just that I hear nothing and yes I tested speakers

**andbin** · December 22nd, 2013, 11:25 AM

Originally Posted by sakonpure6

The error box in eclipse is empty.

Do you mean the "Error Log" / "Problems" view? If there is an exception at runtime, your code prints to standard output, so you must see in the "Console" view.

**sakonpure6** · December 22nd, 2013, 11:33 AM

Originally Posted by andbin

Do you mean the "Error Log" / "Problems" view? If there is an exception at runtime, your code prints to standard output, so you must see in the "Console" view.

There is nothing in console view

**andbin** · December 22nd, 2013, 12:10 PM

Originally Posted by sakonpure6

There is nothing in console view

So no compile errors and no exceptions at runtime but ... no sound. At this point I can only think that: a) there's some problem at system level or b) your mp3s are in a format/compression/bit-rate not supported by JLayer. It's more probable the second.

Try with some free mp3 you can find on internet, for example here: http://www.testsounds.com
I have tested, with your code, the last "Sinus 440 Hz -10 dB (941 KB)", track90.mp3. And works!

**sakonpure6** · December 22nd, 2013, 12:59 PM

Omg I have to be the stupidest guy around. In my volume mixer Java was muted. Thank you so much andbin for your constant feedback, it is highly appreciated.

Edit: Do you know how to run music at the same time as a JFrame window? Because I am making a game and JFrame won't run at the same time the music is playing. Also, how can you loop , or play another sound file at the same time?

**andbin** · December 22nd, 2013, 02:52 PM

Originally Posted by sakonpure6

In my volume mixer Java was muted.

Well ... I could not help more.

Originally Posted by sakonpure6

Do you know how to run music at the same time as a JFrame window? Because I am making a game and JFrame won't run at the same time the music is playing. Also, how can you loop , or play another sound file at the same time?

The play() of Player is synchronous, this means that it keeps busy the "current" thread. If the current thread is the Event Dispatch Thread (for example when you are in the context of an actionPerformed for a JButton), it's a very bad thing. The main rule in Swing is to not block the EDT for too much time.

Solution: start the playing in a new thread. You should have basic knowledge on threads and the implications about the use of multi-threading.

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