what does this mean &0xffff?

[Guest_imported]

in this plugin i have to write. pixels which is a interger in an array are followed by &0xffff

pixels&0xffff

it can not be applied to double numbers?
if anyone could help it would be much appreciated.
i can be emailed at robsroom@hotmail.com

 

[palbano]

That expression evaluates to the bitwise AND of the value contained in the variable 'pixels' and the value 0xffff ( hex notation for decimal 65535).

& is the Bitwise AND operator in Java.

Good luck
-pete