Java 15 adds new features to improve developer productivity and security, including an Edwards-Curve Digital Signature Algorithm (JEP 339) and Hidden Classes (JEP 371)
"Oracle announced the general availability of Java 15 (Oracle JDK 15). After 25 years of innovation, Java continues to be the #1 programming language, used by over 69 percent of full-time developers worldwide. The latest Java Development Kit (JDK) delivers new functionality, including Edwards-Curve Digital Signature Algorithm (JEP 339) and Hidden Classes (JEP 371), as well as former preview features now finalized: Text Blocks (JEP 378) and ZGC (JEP 377). Java 15 includes Sealed Classes (JEP 360) as a first-time preview feature and second previews of Pattern Matching (JEP 375) and Records (JEP 384) for additional community feedback..."