Lobotimze Java mode indentation engine?

[Kai Großjohann]

I think it might be useful, for consistency with others, to frob the
Java indentation settings such that a line after an open paren is
indented as + or ++ instead of aligning with the open paren.

Maybe it would be even more useful if this only happened if the open
paren was the last thing on a line, whereas the existing behavior
stays if there is stuff after the open paren.  This way, I could get:

some_function(first_arg,
              second_arg);
some_really_long_function_name_with_args_on_next_line(
    first_arg,
    second_arg);

Ideas?
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