I prefer to jot down UML-diagrams on paper and then implement them using Java. It would be nice to have a utility which could create UML-diagrams for me which I may share on-line and include in the digital documentation. In other words: I want to create UML diagrams from Java source code.

The utility must be able to:

• Run in Linux.
• Handle Generics, i.e show List<Foo> correctly in parameters and return type.
• Show class inheritance and interface implementations.

It's nice if the utility is able to:

• Run in Windows and Mac OS X.
• Display enums in some nice manner.
• Generate output in a diagram format which I may modify using some other utility.
• Run from the command line.
• Restrict the UML generation to a set of packages which I may specify.
• Handle classes/interfaces which are not part of my source code. It could include the first class/interface which is external in the UML diagram. Perhaps in another color to indicate it being a library/framework created by someone else.
• Focuses on this task and doesn't try to solve the whole issue of documentation.