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Problem with Iterator.hasNext()

Sushma Menon
Greenhorn

Joined: Nov 24, 2001
Posts: 1
Is there any difference between "while (iterator.hasNext()) {" and "while (iterator.hasNext() == true)". Logically both the statements seem correct but while exectuting the latter, sometimes I get unexpected results. While when the former statement is used, always I got the expected result.
Anonymous
Ranch Hand

Joined: Nov 22, 2008
Posts: 18944
No the result is the same. The first solution directly evaluates the result of hasNext(), the second solution first compares the result of hasNext() == true and if this comparison is true then you enter the loop.
Olli
Joel McNary
Bartender

Joined: Aug 20, 2001
Posts: 1824

Could you please elaborate on the "unexpected results." I can't think of anything that would cause this, as the statements should be equal, except that the latter places an extra operation on the stack. Once that operation is evaluated, everthing else should be equal, side effects included.


Piscis Babelis est parvus, flavus, et hiridicus, et est probabiliter insolitissima raritas in toto mundo.
Dirk Schreckmann
Sheriff

Joined: Dec 10, 2001
Posts: 7023
Sushma_menon,
Welcome to JavaRanch!
We ain't got many rules 'round these parts, but we do got one. Please change your display name to comply with The JavaRanch Naming Policy. (How's about just replacing that underscore with a space?)
Thanks Pardner! Hope to see you 'round the Ranch!


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