Thanks for the precision.
I wasn't aware of that detail.

On Tue, 6 Feb 2024 at 05:24, Michal Politowski <mpol@meep.pl> wrote:

> Dnia Mon,  5 Feb 2024 21:47:48 -0500, Henri Tremblay napisał(a):
> > Yes.
> > Let's say you have a file in a directory:
> > "src/main/java/org/zsh/Main.java". The class is named Main and is in the
> > package org.zsh in this case.
> > If you compile it with "javac src/main/java/org/zsh/Main.java" it will
> > generate a file named "src/main/java/org/zsh/Main.class".
> >
> > So, if you execute it the old way, you would do "java -cp src/main/java
> > org.zsh.Main" which means "Please execute the class with a main() method
> > that is called Main and found in the package org.zsh. The classpath where
> > this class can be found is "src/main".
> >
> > If you execute it the new way, you don't need to compile with javac. So
> you
> > only have "src/main/java/org/zsh/Main.java".
> > And you will execute by doing "java src/main/java/org/zsh/Main.java" and
> > that's it.
> >
> > Bottom line, indeed, the ".java" at the end tells that it's a java source
> > file and not a compile class found in the classpath that you want to
> > execute.
>
> Not exactly. You can have a class named java on the classpath.
>
> The precise behaviour as specified here
> https://openjdk.org/jeps/330#Description
> (since Java 11) seems to be: if the first non-option argument is
> - a name of an existing file with .java extension, or
> - a name of an existing file and the --source <version> option is given
> then compile/run the source.
>
> > On Mon, 5 Feb 2024 at 15:44, Bart Schaefer <schaefer@brasslantern.com>
> > wrote:
> >
> > > On Mon, Feb 5, 2024 at 10:04 AM Henri Tremblay <
> henri.tremblay@gmail.com>
> > > wrote:
> > > >
> > > > Java now supports (since Java 10 I think) command lines like
> > > >
> > > > java Math.java
> > > >
> > > > It will then just compile and launch that java file. But zsh won't
> > > autocomplete for that. It only wants a jar, class file or whatever.
> > >
> > > The issue is here in the _arguments setup for _java:
> > >
> > >     '(-):class:_java_class -m main
> ${(kv)opt_args[(i)(-classpath|-cp)]}' \
> > >     '*::args:= _normal' \
> > >      && return 0
> > >
> > > The (-) says that the first word after "java" must either be an option
> > > (start with "-") or must be a class name.  The completion stops there
> > > unless working on the next word.
> > >
> > > How does "java" itself distinguish between a class name and a file
> > > name?  Just whether the string ends in ".java"?
> > >
>
> --
> Michał Politowski
> Talking has been known to lead to communication if practiced carelessly.
>
>