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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
LMFAOOOOOOOOOOO
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not really a mistake, I think it is a pre java 7 thing. but as you may guess, it is outdated. you'd probably get a warning like this on the later versions:
"Note: Raw type ArrayDeque. References to generic type ArrayDeque should be parameterized"