This is the com.sun.net.httpserver portion of a benchmarking test suite comparing a variety of web development platforms.
Package com.sun.net.httpserver provides a simple high-level Http server API, which can be used to build embedded HTTP servers. It is built-in to the Oracle JDK and OpenJDK (but is not part of the Java standard and is not available in other JDKs).
The tests were run with:
http://localhost:8080/plaintext