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what this code returns true

kavitha satteli

Joined: Jul 31, 2007
Posts: 9
(0.0 == -0.0)
dhwani mathur
Ranch Hand

Joined: May 08, 2007
Posts: 621
hi thr

i dont know if i got your doubt or not
but will say
since the values +0.0 and -0.0 are identical
or same so it returns true..............
if you have some other doubt do let us know
please be specific with your doubt....?
Kelvin Chenhao Lim
Ranch Hand

Joined: Oct 20, 2007
Posts: 513
In mathematical terms, +0.0 and -0.0 are the same, so that's why Java defines that comparison to return true. As you may know, it is true that +0.0 and -0.0 have different underlying bit representations, but you can't distinguish between them using the == operator.

However, the Double class does distinguish between the two, so this will print false:

SCJP 5.0
I agree. Here's the link:
subject: what this code returns true
It's not a secret anymore!