On Tue, 14 Jul 2026 05:43:59 GMT, Guanqiang Han <[email protected]> wrote:

>> Please review this change, thanks!
>> 
>> **Description:**
>> 
>> `java -XshowSettings` without an application currently prints the requested 
>> settings, then prints usage information and exits with code 1.
>> 
>> **Solution:**
>> 
>> Treat `-XshowSettings` as an option that can be used without an application 
>> target. During argument parsing, do not mark the absence of a main class or 
>> JAR file as an error when `-XshowSettings` is specified. After the settings 
>> and any explicitly requested launcher output have been processed, exit 
>> normally if no application was provided.
>> 
>> 
>> 
>> ---------
>> - [x] I confirm that I make this contribution in accordance with the 
>> [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai).
>
> Guanqiang Han has updated the pull request incrementally with one additional 
> commit since the last revision:
> 
>   Update -XshowSettings documentation

src/java.base/share/native/libjli/java.c line 555:

> 553:     if (showSettings != NULL && what == NULL) {
> 554:         LEAVE();
> 555:     }

Can't we do this back at line 501 after showing the settings?

test/jdk/tools/launcher/Settings.java line 331:

> 329:         TestResult tr = doExec(javaCmd,
> 330:                                "-Duser.language=en",
> 331:                                "-Duser.country=US",

Why do we need these?

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/31891#discussion_r3576933225
PR Review Comment: https://git.openjdk.org/jdk/pull/31891#discussion_r3576952886

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