Jdk 15: The New Features In Java 15 (2026)

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

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

Reduces pause times by performing evacuation work concurrently. Hidden Classes 💡 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) Useful for domain modeling and pattern matching

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)