Java implementation of Alpha-numeric comparator

Naoto Sato naoto.sato at
Tue Dec 16 19:32:33 UTC 2014

j.t.Collator is basically for locale sensitive sorting, and I think this 
use case is locale independent. Aside from how significant to have it in 
the library, I am not sure j.t.Collator is the right place.


On 12/16/14 11:04 AM, Xueming Shen wrote:
> On 12/16/2014 06:58 AM, roger riggs wrote:
>> Hi Ivan,
>> In which package/class do you propose to add the API to get the
>> comparator?
>> In java.time, comparators are returned from static methods in an
>> interface.
>> This allows lambda to be used for the implementation.
>> For example, ChronoZonedDateTime.timeLineOrder
>> <>()[1]
>> For example a static method could be added to CharSequence:
>> public static int Comparator<CharSequence> alphaNumericComparator() ...
>> In use it would be
>> CharSequence.alphaNumericComparator().compare("012", "234");
> This is more like a special case of j.t.Collator. I'm not sure it's a
> good idea to put this "special"
> comparator into CharSequence, without careful planning. I will assume
> there are more useful
> utility comparators people would like to see here. To use the original
> example, while the
> it's good to have this comparator to compare "jdk 10" and "jdk9", how
> about "jdk-10" and
> "jdk 9"? Yes, it is more like a collator:-)
> -Sherman

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