This document discusses the challenges and opportunities of serverless Java. It notes that while Java is one of the most popular languages, its usage in serverless computing has been limited. However, the Fn Project provides an open-source platform that allows for developing serverless Java applications using established Java tooling while achieving low latency and high performance through techniques like container-optimized JVMs and GraalVM compilation. Overall, serverless Java is viable through these "blueprints" and has a promising future as the ecosystem continues to evolve.