On Tue, 12 Nov 2024 13:17:13 GMT, Jan Lahoda <jlah...@openjdk.org> wrote:
>> Currently, running `java` without any parameters will lead to an output that >> is a full `--help`, which is over 100 lines (on my computer at least), and >> it feels overwhelming. And many people might actually want to run >> JShell/REPL, not the `java` executable, but it is difficult find out about >> JShell. >> >> The proposal herein is to print a much shorter help, together with a pointer >> to JShell, when the executable does not know what to do. I.e. there is >> nothing specified to start, and no option like `--help` is specified. In >> particular, on my machine, it prints: >> >> openjdk 24-internal 2025-03-18 >> >> Usage: java [java options...] <application> [application arguments...] >> >> Where <application> is one of: >> <mainclass> to execute the main method of a compiled class >> -jar <jarfile>.jar to execute the main class of a JAR archive >> -m <module>[/<mainclass>] to execute the main class of a module >> <sourcefile>.java to compile and execute a source-file program >> >> Where key java options include: >> --class-path <class path> >> where <class path> is a list of directories and JAR archives to search >> for class files, separated by ":" >> --module-path <module path> >> where <module path> is a list of directories and JAR archives to search >> for modules, separated by ":" >> >> For additional help on usage: java --help >> For an interactive Java environment: jshell >> >> >> Hopefully, this may be easier both for people trying to run something, and >> for people that are really looking for JShell. >> >> What do you think? >> >> Thanks! > > Jan Lahoda has updated the pull request incrementally with one additional > commit since the last revision: > > Reflecting review feedback: > - using "conciseVersionString" intead of "shortVersionString" > - using <jarfile>.jar <jarfile> About the version string: I think I first proposed including it, because it seems easier and smoother and more user-friendly to just give the version, than to tell the user how they can ask for it and make them ask again. It doesn't take up much space and I just wasn't aware of any counterarguments. ------------- PR Comment: https://git.openjdk.org/jdk/pull/21411#issuecomment-2471273289
