Just when I thought the answer was simple, now it seems more complex.
Are you saying that new would always create a new object but the GC might merge
multiple instances of String into a single instance?
Also, if new String() always creates a new instance, then it seems that this
statement (from String.java) is not quite right:
Because String objects are immutable they can be shared. For example:
String str = "abc";
is equivalent to:
char data[] = {'a', 'b', 'c'};
String str = new String(data);
> On Dec 23, 2021, at 2:55 PM, Simon Roberts <si...@dancingcloudservices.com>
> wrote:
>
> I think there are two things at stake here, one is that as I understand it,
> "new means new", in every case. This is at least partly why the
> constructors on soon-to-be value objects are deprecated; they become
> meaningless. The other is that if the presumption is that we should
> always intern new Strings, I must disagree. Pooling takes time and memory
> to manage, and if there are very few duplicates, it's a waste of both. I
> believe it should be up to the programmer to decide if this is appropriate
> in their situation. Of course, the GC system seems to be capable of
> stepping in in some incarnations, which adds something of a counterexample,
> but that is, if I recall, configurable.
>
>
> On Thu, Dec 23, 2021 at 2:53 PM Xeno Amess <xenoam...@gmail.com> wrote:
>
>> never should，as Object can be use as lock.
>>
>> XenoAmess
>> ________________________________
>> From: core-libs-dev <core-libs-dev-r...@openjdk.java.net> on behalf of
>> Bernd Eckenfels <e...@zusammenkunft.net>
>> Sent: Friday, December 24, 2021 5:51:55 AM
>> To: alan Snyder <fishgar...@cbfiddle.com>; core-libs-dev <
>> core-libs-dev@openjdk.java.net>
>> Subject: Re: a quick question about String
>>
>> new String() always creates a new instance.
>>
>> Gruss
>> Bernd
>> --
>> http://bernd.eckenfels.net
>> ________________________________
>> Von: core-libs-dev <core-libs-dev-r...@openjdk.java.net> im Auftrag von
>> Alan Snyder <javali...@cbfiddle.com>
>> Gesendet: Thursday, December 23, 2021 6:59:18 PM
>> An: core-libs-dev <core-libs-dev@openjdk.java.net>
>> Betreff: a quick question about String
>>
>> Do the public constructors of String actually do what their documentation
>> says (allocate a new instance), or is there some kind of compiler magic
>> that might avoid allocation?
>>
>>
>
> --
> Simon Roberts
> (303) 249 3613
>
