https://devclass.com/2025/01/30/state-of-java-report-shows-strong-migration-from-java-8-rise-of-apache-spark/ from January 2025 lists 46% of Java projectcs being on Java 8 and older. I'm not aware of stats about GWT usage; my assumption is that not too many new projects are being started with GWT these days. There may well be a correlation of GWT users with users of older JDKs.

For us, with https://github.com/SAP/sailing-analytics we have been using GWT since 2011. Our production runtime is still on SAPJVM8 for a number of reasons, although we also ensure runtime compatibility up to Java 24.

https://github.com/gwtproject/gwt/issues/7987, which is essential for our operations, wasn't pulled by the GWT team, so we're on a fork (https://github.com/SAP/gwt-forward-serialization-rpc) anyhow and can probably never make it back to a more modern version of GWT. As such, we may afford the luxury of just not caring, although we'd love to see compiler bugs such as in determining serializability of cyclic type graphs with custom field serializers and generics fixed at some point...

Just keep the 46% in mind, most of which you've already cut off when requiring Java 11...

Best,
-- Axel

On 10/27/25 08:41, 'Frank Hossfeld' via GWT Contributors wrote:
I see no reason to support Java 11 now. Many of my clients are already on Java 17 or planing to move to Java 17 in the near future.

I think, the benefit of dropping support for Java 11 is much greater than supporting it. So, from my point of view: let's drop it.


Colin Alworth schrieb am Sonntag, 26. Oktober 2025 um 20:28:58 UTC+1:

    Its been about three years since the last thread on deprecations,
    and the Java 8 deprecation ended up going by with barely a whisper.

    On the other hand, I'm hearing more interest in Java 21+ features
    than we did for Java 17 at the time - but updating JDT so that we
    can provide those will require dropping support to run on Java 11.

    We seem to be close to a GWT 2.13 release, so GWT 2.14 would be the
    earliest this would take place. The expectation in turn would be
    that our JDT version would then be updated, and possibly Jetty as
    well. Thoughts?

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