How to display audio (wav) files as a graph?

Hi,
I am building a Java Swing application that will play wav audio files and have a requirement to also DISPLAY the waveform as a graph (amplitude vs time).
I have been using some basic java sound methods to play the audio but was hoping that there might be some code out there to also DISPLAY the waveform.
Capability to zoom in and out would be nice also, but any help to simply display a wav file would be great. If it makes any difference the wav files are encoded PCM at 8,16, and 32 kHz sample rates.
I am a novice java programmer (but learning fast)....
Thanks. Bill

A quick search of Yahoo resulted in the following:
[http://sonify.psych.gatech.edu/research/auditorygraphs/index.php]
You might try playing with that...

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