How to run a Play project in Eclipse
In newer versions of play, the command has changed to
play eclipse
For Play 2.x.y, Activator is tool of choice
activator eclipse
or
./activator eclipse
to use project local activator copy (if exists)
Play eclipsify creates a run configuration for you.
Run --> Run Configurations --> Java Applications --> testApp
If you need to debug first run the application as indicated then
Run --> Debug Configurations --> Remote Java Applications --> Connect JPDA to testApp