Returns a representation of the specified floating-point value according to the IEEE 754 floating-point "double format" bit layout, preserving Not-a-Number (NaN) values.
Bit 63 (the bit that is selected by the mask
0x8000000000000000L
) represents the sign of the
floating-point number. Bits
62-52 (the bits that are selected by the mask
0x7ff0000000000000L
) represent the exponent. Bits 51-0
(the bits that are selected by the mask
0x000fffffffffffffL
) represent the significand
(sometimes called the mantissa) of the floating-point number.
If the argument is positive infinity, the result is
0x7ff0000000000000L
.
If the argument is negative infinity, the result is
0xfff0000000000000L
.
If the argument is NaN, the result is the long
integer representing the actual NaN value. Unlike the
doubleToLongBits
method,
doubleToRawLongBits
does not collapse all the bit
patterns encoding a NaN to a single "canonical" NaN
value.
In all cases, the result is a long
integer that,
when given to the longBitsToDouble(long)
method, will
produce a floating-point value the same as the argument to
doubleToRawLongBits
.
value | a double precision floating-point number. |
Diagram: Number