Re: Perl Pro but Java Newbie: Need nudge in proper direction for my favorite Perl routine in Java

From:

Joshua Cranmer <Pidgeot18@verizon.invalid>

Newsgroups:

comp.lang.java.programmer

Date:

Sun, 14 Sep 2008 19:53:06 -0400

Message-ID:

<gak85n$mh1$1@news-int.gatech.edu>

Mark Space wrote:

Joshua Cranmer wrote:

Autoboxing is pretty smart, except for one (admittedly a bit edgy) case:

List<Integer> list = Arrays.asList('a');

or other cases where you would have to both convert and auto{un}box
(?5.3 doesn't allow both a widening primitive conversion and a
{un}boxing conversion for method invocation conversions).

That actually might be a good thing. Autoboxing would create two
objects here -- the array and the object -- just to pass one primitive.
It's probably a better idea just to create a method that takes a single
primitive and get the performance boost.

My example was bad then; autoboxing cannot convert a char to an Integer
as a method parameter, variable arity notwithstanding.

I wonder if autoboxing is smart enough to match things like
public static void testMethod( int i, int i2 ) {}

before it matches "Object... o"

Any primitive-level match is matched before autoboxing.

--
Beware of bugs in the above code; I have only proved it correct, not
tried it. -- Donald E. Knuth