Are there tools for documenting Java applications?

I wonder if there is a tool for recording Java applications I mean, if I want to specify in my code what each function and variable should take and its type (int, double,..., etc.)... What should I do? I want it in a separate file (a tool generates a file in this format (such as. CHM))... This thing is in Net, and there is a tool that can do this for you... I hope there is a tool in Java that can do similar work

Thank you.

Thank you for your help... It's really useful. I'm using Javadoc now... Great. Thank you for all your recommendations;)

Solution

Yes, please check Javadoc

http://en.wikipedia.org/wiki/Javadoc

You may have installed everything necessary If you are using eclipse, you can generate HTML documents directly from the IDE