Returns a representation of the specified floating-point value according to the IEEE 754 floating-point "double format" bit layout.
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
0x7ff8000000000000L
.
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
doubleToLongBits
(except all NaN values are
collapsed to a single "canonical" NaN value).
value | a double precision floating-point number. |
Diagram: Number