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

Stuart Kent 54cf4a6c28 Restructure exercise directory Reference solution directory was renamed and move to the always-excluded-from-delivery .meta folder.		9 лет назад
..
.meta/src/reference/java	Restructure exercise directory	9 лет назад
src	Restructure exercise directory	9 лет назад
README.md	Replace exercise templates with track-level default	9 лет назад
build.gradle	Format build.gradle files	9 лет назад

Acronym

Convert a phrase to its acronym.

Techies love their TLA (Three Letter Acronyms)!

Help generate some jargon by writing a program that converts a long name like Portable Network Graphics to its acronym (PNG).

To run the tests:

$ gradle test

For more detailed info about the Java track see the help page.

Source

It's possible to submit an incomplete solution so you can see how others have completed the exercise.