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I hadn't tried setting `org.gradle.java.home`, but if that works, it
might be easier than our current recipe.<br>
<br>
-- Kevin<br>
<br>
<br>
<div class="moz-cite-prefix">On 10/14/2025 2:24 AM, Nir Lisker
wrote:<br>
</div>
<blockquote type="cite" cite="mid:CA+0ynh8k621-A2uQ0N6usfjjd1TiT3NFTmdwxuQqGT-TMu8vHw@mail.gmail.com">
<div dir="ltr">Gradle tells you how to find out what you're doing
wrong:
<div><br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">*
Try:<br>
> Run with --stacktrace option to get the stack trace.<br>
> Run with --debug option to get more log output.<br>
> Run with --scan to get full insights.<br>
> Get more help at <a href="https://help.gradle.org/" rel="noreferrer" target="_blank" style="color:rgb(86,163,241)" moz-do-not-send="true" class="moz-txt-link-freetext">https://help.gradle.org</a>.</blockquote>
<div><br>
</div>
<div>In any case, the error message is straightforward:
"Unsupported class file major version 69" means that the
corresponding Java version (25) is unsupported in the Gradle
version you're using. You can create a file inside your gradle
home directory (.gradle) called "gradle.properties" and set
the org.gradle.java.home property to the path of a previous
Java version if you don't want to change your global env var.</div>
</div>
<br>
<div class="gmail_quote gmail_quote_container">
<div dir="ltr" class="gmail_attr">On Tue, Oct 14, 2025 at
9:41 AM Michael Zucchi <<a href="mailto:notzed@gmail.com" moz-do-not-send="true" class="moz-txt-link-freetext">notzed@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
Orion,<br>
<br>
I believe you have to use openjdk 24 as gradle 8.14.x doesn't
support 25.<br>
<br>
I also had to add -Dorg.gradle.java.home=/correct/path as it
insisted on <br>
using the wrong version of many installed locally.<br>
<br>
Otherwise I found it pretty trivial to build, good luck.<br>
<br>
Z<br>
<br>
<br>
On 14/10/25 10:52, Orion Poplawski wrote:<br>
> So I'm stepping back to simply try building openjfx with
gradlew but I <br>
> get:<br>
><br>
> $ sh gradlew --info build<br>
> Initialized native services in:
/home/orion/.gradle/native<br>
> Initialized jansi services in: /home/orion/.gradle/native<br>
> The client will now receive all logging from the daemon
(pid: 253483). <br>
> The daemon log file: <br>
> /home/orion/.gradle/daemon/8.14.2/daemon-253483.out.log<br>
> Starting 2nd build in daemon [uptime: 2 mins 22.763 secs,
performance: <br>
> 97%, GC rate: 0.00/s, heap usage: 2% of 512 MiB, non-heap
usage: 9% of <br>
> 384 MiB]<br>
> Using 6 worker leases.<br>
> Now considering [/home/orion/openjfx-25/jfx25u-25-29] as
hierarchies <br>
> to watch<br>
> Now considering
[/home/orion/openjfx-25/jfx25u-25-29/buildSrc, <br>
> /home/orion/openjfx-25/jfx25u-25-29] as hierarchies to
watch<br>
> Watching the file system is configured to be enabled if
available<br>
> File system watching is active<br>
> Starting Build<br>
> Caching disabled for Groovy DSL script compilation
(settings) because:<br>
> Build cache is disabled<br>
> Not worth caching.<br>
> Compiling settings file <br>
> '/home/orion/openjfx-25/jfx25u-25-29/settings.gradle'
using <br>
> BuildScriptTransformer.<br>
><br>
> FAILURE: Build failed with an exception.<br>
><br>
> * What went wrong:<br>
> BUG! exception in phase 'semantic analysis' in source
unit <br>
> '_BuildScript_' Unsupported class file major version 69<br>
> > Unsupported class file major version 69<br>
><br>
> * Try:<br>
> > Run with --stacktrace option to get the stack trace.<br>
> > Run with --debug option to get more log output.<br>
> > Run with --scan to get full insights.<br>
> > Get more help at <a href="https://help.gradle.org" rel="noreferrer" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">https://help.gradle.org</a>.<br>
><br>
> BUILD FAILED in 466ms<br>
><br>
> $ java --version<br>
> openjdk 25 2025-09-16<br>
> OpenJDK Runtime Environment (Red_Hat-25.0.0.0.36-1)
(build 25+36)<br>
> OpenJDK 64-Bit Server VM (Red_Hat-25.0.0.0.36-1) (build
25+36, mixed <br>
> mode, sharing)<br>
><br>
> What am I doing wrong?<br>
><br>
<br>
</blockquote>
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</blockquote>
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