Jdk 15: The New Features In Java 15 [HD 2025]

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

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)

Both low-latency Garbage Collectors are now production-ready. Scalable, low-latency (sub-millisecond) GC. JDK 15: The new features in Java 15

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.

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 Useful for domain modeling and pattern matching

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

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) Automatically manages indentation

Reduces pause times by performing evacuation work concurrently. Hidden Classes