Porting web-app for a tablet

My web app is written in Java with front-end in JS. I want to port to tablet and other touch mobile devices. Developing a native API is ofcourse an option but I would prefer making the old app work on table开发者_开发技巧t.

I know I would need to make some changes in UI for the touch interface and I am willing to do it.

So My question is: A*re there tablet Simulators available on which I can try my app and see where it breaks on such device.*

What would be the best approach to proceed on this?

thanks in advance!

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Tablets use various OS's and, thus, different API's, supported features, etc... For iPad, for imstance, XCode provides a simulator. I read somewhere that the BB tablet coming out will have a simulator for dev as well.