CharSequence.subSequence optimizations

Pavel Rappo pavel.rappo at
Thu Oct 29 10:36:48 UTC 2015

> On 29 Oct 2015, at 00:48, Aleksey Shipilev <aleksey.shipilev at> wrote:
> Doesn't that break when CharSequence implementation is mutable?
> E.g. with StringBuilder, you cannot return "this" when "end ==
> StringBuilder.length()" at the time of .subSequence() call.

True. This trick cannot be used in cases where CharSequence is able to change
its length. (As far as I understand, possible changes in contents are ok.)


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