This is a Java code dojo.
You will find code katas (or exercises) of different levels.
The ideas for these exercises are mostly based on programming tasks from Rosetta Code.
Basically it should be possible to solve such an exercise in about 30 to 60 minutes.
The following levels are available (at the moment):
Some hints for solving the exercises.
To perform these exercises you need a JDK 8 and Maven 3.3.x.