Audio problem/API

Hey all,

Does anyone have an idea how I could implement the following?

Im trying to write a program to queue and play music. My first idea was to have a database with a table of mp3 details (id, name, dir, etc) and a table called queue which would queue up the id's of the songs to be played. Then using the following code (java):

try{
   final String launch = "cmd /c start " + filePath;
   (Runtime.getRuntime()).exec(launch);
} catch (IOException e) ;

which would run the song in the default audio player. One problem with this way is how do I know when a song is finished- to delete the first in the queue and play the next? Anybody have any ideas to overcome this?

Or does someone know of an api to handle this section- you dont have to limit to java, I have a little experience in C# also and I'm willing to learn anything new to accomplish this.

Hopefully someone can help me out,
Thanks in advance...