Project Loom Early-Access Builds

These builds are intended for developers looking to "kick the tyres" and provide feedback on using the API or by sending bug reports.

Warning: This build is based on an incomplete version of JDK 25.

Documentation

API Javadoc

Build 25-loom+1-11 (2025/3/10)

These early-access builds are provided under the GNU General Public License, version 2, with the Classpath Exception.

Linux / AArch64 tar.gz (sha256) 208953069

Linux / x64 tar.gz (sha256) 211087572

macOS / AArch64 tar.gz (sha256) 204647762

macOS / x64 tar.gz (sha256) 207009650

Windows / x64 zip (sha256) 210462216

Linux / AArch64	tar.gz (sha256)	208953069
Linux / x64	tar.gz (sha256)	211087572
macOS / AArch64	tar.gz (sha256)	204647762
macOS / x64	tar.gz (sha256)	207009650
Windows / x64	zip (sha256)	210462216

Notes

These builds are based on jdk-25+13
This build improves the implementation of Java monitors (synchronized methods) to work better with virtual threads.
If you have difficulty downloading any of these files please contact download-help@openjdk.org.

Feedback

Please send feedback via e-mail to loom-dev@openjdk.org. To send e-mail to this address you must first subscribe to the mailing list.

Disclaimers

Early-access (EA) functionality might never make it into a general-availability (GA) release.
EA functionality might be changed or removed at any time.
The existence of EA builds does not imply that the functionality being tested will be present in any particular GA release.
The platforms supported and the packaging options available for a GA build might be different than those available for EA builds.
EA builds are not tested to the same level to which Oracle tests GA builds. EA builds are produced for the purpose of gathering feedback. Use for any other purpose is at your own risk.
EA builds might be missing security-vulnerability fixes that are available in GA builds or in other OpenJDK projects.
Oracle does not provide support for EA builds.

International use restrictions

Due to limited intellectual property protection and enforcement in certain countries, the source code may only be distributed to an authorized list of countries. You will not be able to access the source code if you are downloading from a country that is not on this list. We are continuously reviewing this list for addition of other countries.