Immutables

Java annotation processor to generate Immutable classes, Builders, with a Style!

[Immutables @ImmutablesOrg]

v2.12.1 released. Mostly fixes for some cases and added Java 25/javac to the build matrix. As always, want to thank all for bug reports and PRs!

[Immutables @ImmutablesOrg]

3/3 ... and many more, and, at last, some more documentation on the updated https://t.co/PKkQ8chORM !

[Immutables @ImmutablesOrg]

The release is called "12 Anniversary Edition". Yep, 12 years since late 2013/early 2014 when first pre-1.0 releases of Immutables were published. Now we have first-class record builders, improved nullable as type annotations (JSpecify), Jackson 3 integration 2/2+1

[Immutables @ImmutablesOrg]

I want to thank you all contributors for all the bug reports, PRs, and feedback, that's enormous and helped project to catch up in 2025! Today we've released v2.12.0 , which is a minor update, but sort of concludes all updates, bug-fixes and refinements done this year. 1/2

[Immutables @ImmutablesOrg]

@vavr_io well, conventional wisdom says you can break compat in minor versions while below 1.0, i.e. in 0.xx, so no remorse)

[Immutables @ImmutablesOrg]

@vavr_io this is probably overthinking, what if dependencies expect different behavior regardless of switch. not insisting it's a good idea, but it should be ok )

[Immutables @ImmutablesOrg]

@vavr_io can retain compatibility, but make future behavior available under system property, for example

[Immutables @ImmutablesOrg]

@nicolai86 Aside from the main guide., here's what might be somewhat helpful: integration with @vavr_io (has persistent collections) https://t.co/3znOxtCxaa or how to integrate other arbitrary libraries https://t.co/29UYuQcW5v

[Immutables @ImmutablesOrg]

'no' votes matter, if in doubt, vote 'no' is ok ) Concerns and wishlists are welcome

[Immutables @ImmutablesOrg]

In 2019, should there be Immutables3 — a fully modular and extendable, Java11+ with batteries included, but a lot of obsolete baggage dropped?

[Immutables @ImmutablesOrg]

@talios @ndasriaux @AmiraultTony @vavr_io not really, but you can put abstract and case-like classes under umbrella type and generate tree transformers and visitors

[Nicolas Dasriaux @ndasriaux]

@AmiraultTony @vavr_io @ImmutablesOrg And yes, @vavr_io and @ImmutablesOrg together is a match made in heaven. You can encode immutable objects and ADTs in Immutables and even pattern match on ADTs in Vavr. Typing even more along the way, making your code explicit.

[Immutables @ImmutablesOrg]

One of those rare moments when left previous employer and have not started a new job yet, so enjoying dedicating some time to Immutables maintenance

[Immutables @ImmutablesOrg]

v2.7.3 released with the important fix for broken "from" methods with Modifiable https://t.co/FtRvZSpQ6S

[Immutables @ImmutablesOrg]

@charlielamothe jfyi actually released 2.7.2 yesterday, just cannot update the site yet to increment version

[Immutables @ImmutablesOrg]

@charlielamothe definitely, 2.7.2 is being prepared to be released, I expect this week! thank you

[Immutables @ImmutablesOrg]

Hanging at QConSF, hope to see folks )

[Immutables @ImmutablesOrg]

Version 2.7.2 released! Thank you for issue reports and PRs with fixes, corrections, and features!!! Release notes https://t.co/au4cvK0sXr

[Dominokit @dominokit]

You want to use @ImmutablesOrg in your #FrontEnd? #dominokit made it easy, checkout https://t.co/eEQhK9W7B1

[Immutables @ImmutablesOrg]

2.7.1 was released with fixes, PRs and refinements, see changelog https://t.co/D1AL04xaVM Thank you for issue reports, questions, PRs and for you patience!