Java Reference
In-Depth Information
Note that none of the string formats include information regarding the
radix in that formatthere is no leading
0
for octal, or
0x
for hexadecimal.
If radix information is needed then you must construct it yourself.
The
Short
,
Integer
, and
Long
classes have a method
reverseBytes
that re-
turns a value with its constituent bytes in the reverse order to the value
passed in. For example,
Integer.reverseBytes(0x0000ABCD)
returns an
int
value with the hexadecimal representation of
0xCDAB0000
. The
Integer
and
Long
classes also provide a family of bit-querying methods:
public static int
bitCount(
type
val)
Returns the number of one-bits in the two's complement bin-
ary representations of
val
.
public static
type
highestOneBit(
type
val)
Returns a value consisting of all zero-bits, except for a single
one-bit, in the same position as the highest-order (left-most)
one-bit in
val
.
public static
type
lowestOneBit(
type
val)
Returns a value consisting of all zero-bits, except for a single
one-bit, in the same position as the lowest-order (right-most)
one-bit in
val
.
public static int
numberOfLeadingZeros(
type
val)
Returns the number of zero-bits preceding the highest-order
one-bit in
val
.
public static int
numberOfTrailingZeros(
type
val)
Returns the number of zero-bits following the lowest-order
one-bit in
val
.
