Nest-based access controls (aka "Nestmates"): revisits the implementation of inner classes and eliminates the need for compilers to insert bridge methods.
Dynamic class-file constants (aka "condy"): reduces the cost and disruption of creating new forms of materializable class-file constants and opens the door to new performance and platform approaches.
ZGC (Experimental): a brand-new garbage collector designed for sub-10ms pause times (even on large heaps) with an aim of no more than a 15% performance penalty.
Flight Recorder: low overhead data collection framework for troubleshooting Java applications and the HotSpot JVM, previously a commercial feature, now open-sourced.
New standard HTTP library: A new module java.net.http that standardizes the incubating API and allows flow-based HTTP/1.1 and HTTP/2 support
TLS 1.3: Implement the recently standardized new version of Transport Layer Security
Local-Variable Syntax for Lambda Parameters: Updating the lambda syntax to use the var type-inferencing introduced in Java 10.
