kristofer/JavaExercism: lots of exercises in java... from https://github.com/exercism/java

lots of exercises in java... from https://github.com/exercism/java

FridaTveit 2754bec3ae grep: add exercise (#1429) * grep: WIP add exercise * grep: implement exercise * grep: add to config.json * grep: update config.json and add hints * grep: Add .keep file * grep: improve reference solution * grep: Make sure settings.gradle is in alphabetical order		6 lat temu
..
src/reference/java	grep: add exercise (#1429)	6 lat temu
hints.md	grep: add exercise (#1429)	6 lat temu
version	grep: add exercise (#1429)	6 lat temu