Explore Java 8's new features for compiler writers in this 46-minute talk by Dan Smith. Dive into default methods, examining their class file format, permitted interface flags, invocation forms, and semantics. Learn about maximally specific methods, resolution, and the semantics of various invocation types. Discover the Lambda Metafactory, including its contract, API, and relevance. Gain insights into type annotations, covering JSR 308, class file attributes, and parameter reflection. Enhance your understanding of Java 8's compiler-related improvements and their implications for language implementation.