Reduces pause times by performing evacuation work concurrently. Hidden Classes
These features graduated from "preview" or "experimental" status to being permanent parts of the language. Sealed Classes (First Preview) JDK 15: The new features in Java 15
Both low-latency Garbage Collectors are now production-ready. Scalable, low-latency (sub-millisecond) GC. low-latency (sub-millisecond) GC.