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 lat temu
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.meta/src/reference/java	Restructure exercise directory	9 lat temu
src	Restructure exercise directory	9 lat temu
README.md	Replace exercise templates with track-level default	9 lat temu
build.gradle	Format build.gradle files	9 lat temu

Bracket Push

Given a string containing brackets [], braces {} and parentheses (), verify that all the pairs are matched and nested correctly.

To run the tests:

$ gradle test

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

Source

Ginna Baker

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