I have download Grevill gervill.jar and with my existing code follow from: http://www.jsresources.org/examples/MidiPlayer.html
Could anyone spare a little effort to write a tutorial on loading SF2 soundbank? I would cry without a tutorial on the web.
Do some research.
If you want to learn how this code works, download it and try it. Generate javadoc API reference docs from the source. Try to figure it out. If you have problems getting it to work, post another question like this, but include specific details of the problem you are having.
You'll get a much better response this way. Stack Overflow is not someplace to find someone to do your research work for you.