How to form a list of all possible forms from a word (in different number, gender, case)?

Question

Java

For the first time I encountered such a task and I don’t know which side to approach to look for solutions on google.
Has anyone dealt with a similar task?
I'm interested in Russian for now, then I'll need English.

Edit: I would not like to implement this myself. Whether me interests there are ready decisions.

Answer 1

In Google search: pymorphy2 javaand further on the links.

Answer 2

Zaliznyak's dictionary will help you if you are going to dig ab ovo.

Answer 3

The easiest way is to take a dictionary of endings and use them to calculate a word and its word forms.