Jdk 15: The New Features In Java 15 Apr 2026

💡 JDK 15 made Java more readable with Text Blocks and more efficient with the finalization of the ZGC and Shenandoah garbage collectors.

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

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) JDK 15: The new features in Java 15

Both low-latency Garbage Collectors are now production-ready. Scalable, low-latency (sub-millisecond) GC.

A new platform-independent implementation of the EdDSA signature scheme. Higher security and performance. Found in the java.security package. 🛠️ JVM and Tooling Improvements ZGC and Shenandoah (Finalized) 💡 JDK 15 made Java more readable with

These features graduated from "preview" or "experimental" status to being permanent parts of the language. Sealed Classes (First Preview)

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) 🚀 Top Production Features Sealed classes and interfaces

Allows Java programs to safely and efficiently access arbitrary memory outside of the Java heap. Found in jdk.incubator.foreign . 🧹 Deprecations and Removals Completely removed. RMI Activation: Deprecated for future removal. Solaris and SPARC Ports: Support officially removed. Biased Locking: Disabled by default and deprecated.