This is a sample Play Framework Java project. It is a RESTful API for money transfers between users' accounts with in-memory data storage. Tests are included.
To run it, you need sbt:
tx$ sbt
[tx] $ compile
[success] Total time: 1 s, completed 28.05.2017 15:51:33
[tx] $ test
[info] Test run started
...
[success] Total time: 13 s, completed 28.05.2017 15:52:03
[tx] $ run
[info] p.c.s.NettyServer - Listening for HTTP on /0:0:0:0:0:0:0:0:9000
Then direct yourself to http://localhost:9000/ for brief API description.