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 made Java more readable with Text Blocks and more efficient with the finalization of the ZGC and Shenandoah garbage collectors. 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: The new features in Java 15