This is an experimental pure Java implementation of Cap'n Proto.
It doesn't do much yet.
To get started, try this:
$ make
$ cd examples
$ echo '(people = [(id = 123, name = "Alice", email = "alice@example.com", employment = (school = "MIT"))])' \
| capnp encode addressbook.capnp AddressBook | java -cp .:.. AddressbookMain read