Then all ImmutableBitSet instance are instance of a mutable BitSet class when we use instance of. I just worry that could be kind of misleading sometimes.
Gary Gregory <[email protected]> 于 2019年10月29日周二 上午3:29写道： > On Mon, Oct 28, 2019 at 3:16 PM Xeno Amess <[email protected]> wrote: > > > then it is better to make a AbstractBitSet abstract class?and two sub > > classes MutableBitSet and ImmutableBitSet... > > > > Why would you need that? The JRE already has a BitSet class. The idea is to > reuse it, hence the new Lang immutable type extending the existing JRE > mutable one. I do not think we need to reinvent the wheel here. > > Gary > > > > ?? Outlook for Android<https://aka.ms/ghei36> > > > > ________________________________ > > From: Gary Gregory <[email protected]> > > Sent: Tuesday, October 29, 2019 2:42:29 AM > > To: Commons Developers List <[email protected]> > > Subject: [lang] immutable BitSet > > > > Hi All, > > > > Any thoughts for or against adding an ImmutableBitSet as a subclass > > of BitSet? > > > > It would throw an exception on attempt to mutate. > > > > I can then be used to define an EMPTY_BITSET constant. > > > > I could also be used in some of our methods that return a new empty bit > > set, if appropriate of course. > > > > Gary > > >
