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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.
That's Java 11 or later
This might be a bug on java. Some times, when using equal on the numeric objects, instead comparing the value, they compare the instances memory addresses.
You could use the string repeat function tocreatedthe masked part