Sven Woltmann • 6/4/2026

Java 27 Features (with Examples)

This article provides a comprehensive overview of Java 27's features, which are fixed as of June 4, 2026. It covers nine JDK Enhancement Proposals (JEPs), including compact object headers enabled by default, G1 as the default garbage collector on small instances, post-quantum hybrid key exchange for TLS 1.3, and JFR in-process data redaction. It also details re-submitted preview features like lazy constants, primitive type patterns, structured concurrency, PEM encodings, and the Vector API, along with other changes such as updated ISO-8601 formatters and removal of JVMCI.

0 comments

#Jep #Compact Object Headers #Java 27