A DESCRIPTION OF THE PROBLEM :
If you look at the documentation for ceil it says:

<quote> * If the argument value is less than zero but greater than -1.0, then the result is negative zero.

Note that the value of Math.ceil(x) is exactly the value of -Math.floor(-x).
</quote>

Since the functions of ceil and floor compliment each other, I would think their descriptions should match up as well. To wit, I think the following should be added to floor()

<quote> * If the argument value is greater than zero but less than -1.0, then the result is (positive) zero.

Note that the value of Math.floor(x) is exactly the value of -Math.ceil(-x).
</quote>



URL OF FAULTY DOCUMENTATION :
http://java.sun.com/j2se/1.4.2/docs/api/index.html
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