Top 10 Java 25 Features

Scoped Values: Finalized feature for immutable, thread-local-like data sharing across virtual threads without explicit parameter passing.

Module Import Declarations: Simplifies imports by allowing import module M; to bring in all public classes from a module and its transitive dependencies.

Compact Source Files: Enables writing simple Java programs without class declarations, ideal for tests and demos.

Instance Main Methods: Allows defining main methods as instance methods (e.g., void main() or void main(String... args)) instead of requiring static, enabling direct instance creation and method calls for simpler program entry points.

Flexible Constructor Bodies: Permits executable code before super() calls, enhancing initialization flexibility.

Generational Shenandoah: Upgrades Shenandoah GC to generational mode for better throughput and low-latency collection in enterprise apps.

Compact Object Headers: Reduces object header size to 64 bits on 64-bit JVMs, improving memory efficiency.

JFR CPU-Time Profiling: Adds Linux kernel-based CPU time sampling to JDK Flight Recorder for precise performance analysis.

PEM Encodings: Previews API for encoding/decoding cryptographic objects like keys and certificates in PEM format.

Vector API (10th Incubation): Continues incubation with enhancements for high-performance vector computations on supported hardware.