JDK 27

This release will be the Reference Implementation of version 27 of the Java SE Platform, as specified by JSR 402 in the Java Community Process.

Status

The main line is open for bug fixes, small enhancements, and JEPs as proposed and tracked via the JEP Process.

Early-access binaries, under the GPL, are available here.

Schedule

2026/06/04		Rampdown Phase One (branch from main line)
2026/07/16		Rampdown Phase Two
2026/08/06		Initial Release Candidate
2026/08/20		Final Release Candidate
2026/09/14		General Availability

Features

JEPs proposed to target JDK 27		review ends
523:	Make G1 the Default Garbage Collector in All Environments	2026/05/19
534:	Compact Object Headers by Default	2026/05/19
537:	Vector API (Twelfth Incubator)	2026/05/19

JEPs targeted to JDK 27, so far
527:	Post-Quantum Hybrid Key Exchange for TLS 1.3
531:	Lazy Constants (Third Preview)
532:	Primitive Types in Patterns, instanceof, and switch (Fifth Preview)
533:	Structured Concurrency (Seventh Preview)