lots of exercises in java... from https://github.com/exercism/java
Stuart Kent 8d0aae53d7 hello-world: update now that two-fer exists 9 lat temu
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example/java hello-world: update now that two-fer exists 9 lat temu
main/java hello-world: update now that two-fer exists 9 lat temu
test/java hello-world: update now that two-fer exists 9 lat temu