What is an elegant, readable and non-verbose way of comparing two floating point value for exact equality?

As simple as it may sound, its a wicked problem. The == operator doesn't get the job done for NaN and also has special treatment for zero:

(+0.0 == -0.0) -> true
Double.NaN == Double.NaN -> false

But I want to determine if two values are exactly the same (but I do not care for different NaN patterns, so any NaN == any other NaN -> true).

I can do this with this ugly Monster piece of code:

Double.doubleToLongBits(a) == Double.doubleToLongBits(b)

Is there a better way to write this (and make the intent obvious)?

java floating-point
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