I wonder if any of you has some ideas for Katas. In my case for the Java language.
In case you wonder what a Kata (in programming) is: a (small) coding challenge which you solve repeatingly to practice and improve your coding skills.
A nice written story is here: The clean Coder: The Craftsman 62, The Dark Path.
Some Katas can be found here: codekata.pragprog.com, but I wonder if you can share better (especially smaller) execises with me.
What experiences do you have with doing Katas?