To build the examples, run in this directory:
$ ../gradlew installDist
This creates the scripts hello-world-server, hello-world-client, route-guide-server, and route-guide-client in the build/install/grpc-examples/bin/ directory that run the examples. Each example requires the server to be running before starting the client.
For example, to try the hello world example first run:
$ ./build/install/grpc-examples/bin/hello-world-server
And in a different terminal window run:
$ ./build/install/grpc-examples/bin/hello-world-client
That's it!
Please refer to Getting Started Guide for Java for more information.