The java.lang.ProcessHandle.Info interface contains methods for the command and arguments.
Some operating system can only provide a limited command line string.
The string may not contain the path of the command and may be truncated.

The Info.commandLine() method is proposed as:
        /**
         * Returns the command line of the process.
         * <p>
         * If {@link #command command()} and  {@link #arguments arguments()} return non-null
         * optionals, this is simply a convenience method which concatenates
         * the values of the two functions separated by spaces. Otherwise it will return a
         * best-effort, platform dependent representation of the command line.
         *
         * @apiNote Note that the returned executable pathname and the
         *           arguments may be truncated on some platforms due to system
         *           limitations.
         *           <p>
         *           The executable pathname may contain only the
         *           name of the executable without the full path information.
         *           It is undecidebale whether white space separates different
         *           arguments or is part of a single argument.
         *
         * @return an {@code Optional<String>} of the command line
         *         of the process
         */
        public Optional<String> commandLine();