These features graduated from "preview" or "experimental" status to being permanent parts of the language. Sealed Classes (First Preview)
Reduces pause times by performing evacuation work concurrently. Hidden Classes JDK 15: The new features in Java 15
JDK 15 was released in September 2020 as a short-term feature release. It focused on finalizing major syntax enhancements and improving JVM performance. 🚀 Top Production Features It focused on finalizing major syntax enhancements and
💡 JDK 15 made Java more readable with Text Blocks and more efficient with the finalization of the ZGC and Shenandoah garbage collectors. Intended for frameworks that generate classes at runtime
Classes that cannot be used directly by the bytecode of other classes. Intended for frameworks that generate classes at runtime. Improved security and reduced memory footprint. Foreign-Memory Access API (Second Incubator)
Sealed classes and interfaces restrict which other classes may extend or implement them. Provides better control over inheritance. Useful for domain modeling and pattern matching. Syntax: public sealed class Shape permits Circle, Square {} Text Blocks (Finalized) Multiline string literals are now standard. Eliminates the need for most escape sequences. Automatically manages indentation. Uses triple quotes: """ ... """ . EdDSA (Edwards-Curve Digital Signature Algorithm)