Both low-latency Garbage Collectors are now production-ready. Scalable, low-latency (sub-millisecond) GC.
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 made Java more readable with Text Blocks and more efficient with the finalization of the ZGC and Shenandoah garbage collectors.