RFR: 7904141: JTReg should support running compact source files

[Jaikiran Pai]

On Thu, 29 Jan 2026 10:45:15 GMT, Christian Stein <cstein at openjdk.org> wrote:

> Please review this change that adds support for running compact source files as jtreg `main` tests.
> 
> This pull request also adds JDK 25 to the GHA-based CI workflow and updates to use newer GitHub actions: `actions/checkout at v6` and `actions/setup-java at v5`

src/share/classes/com/sun/javatest/regtest/agent/MainWrapper.java line 184:

> 182: 
> 183:                 // RUN JAVA PROGRAM
> 184:                 Class<?> mainClass = Class.forName(className, false, cl);

Hello Christian, I haven't yet looked at the changes in detail, but I think this change here should be guarded by a check against the current runtime version. i.e. something like:

if (currentRuntimeVersion < 25) {
    Class<?> c = Class.forName(className, false, cl);
    Method mainMethod = c.getMethod("main", String[].class);
    mainMethod.invoke(null, (Object) args);
} else {
   ... // the new changes proposed in this PR
}

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PR Review Comment: https://git.openjdk.org/jtreg/pull/313#discussion_r2751142862