public final class UnsignedBytes extends Object
byte primitives that interpret
values as unsigned (that is, any negative value b is treated
as the positive value 256 + b). The corresponding methods that treat
the values as signed are found in SignedBytes, and the methods for
which signedness is not an issue are in Bytes.
See the Guava User Guide article on primitive utilities.
| Modifier and Type | Field and Description |
|---|---|
static byte |
MAX_POWER_OF_TWO
The largest power of two that can be represented as an unsigned
byte. |
static byte |
MAX_VALUE
The largest value that fits into an unsigned byte.
|
| Modifier and Type | Method and Description |
|---|---|
static byte |
checkedCast(long value)
Returns the
byte value that, when treated as unsigned, is equal to
value, if possible. |
static int |
compare(byte a,
byte b)
Compares the two specified
byte values, treating them as unsigned
values between 0 and 255 inclusive. |
static String |
join(String separator,
byte... array)
Returns a string containing the supplied
byte values separated by
separator. |
static Comparator<byte[]> |
lexicographicalComparator()
Returns a comparator that compares two
byte arrays
lexicographically. |
static byte |
max(byte... array)
Returns the greatest value present in
array. |
static byte |
min(byte... array)
Returns the least value present in
array. |
static byte |
parseUnsignedByte(String string)
Returns the unsigned
byte value represented by the given decimal string. |
static byte |
parseUnsignedByte(String string,
int radix)
Returns the unsigned
byte value represented by a string with the given radix. |
static byte |
saturatedCast(long value)
Returns the
byte value that, when treated as unsigned, is nearest
in value to value. |
static int |
toInt(byte value)
Returns the value of the given byte as an integer, when treated as
unsigned.
|
static String |
toString(byte x)
Returns a string representation of x, where x is treated as unsigned.
|
static String |
toString(byte x,
int radix)
Returns a string representation of
x for the given radix, where x is treated
as unsigned. |
public static final byte MAX_POWER_OF_TWO
byte.public static final byte MAX_VALUE
@CheckReturnValue public static int toInt(byte value)
value + 256 if value is
negative; value itself otherwise.public static byte checkedCast(long value)
byte value that, when treated as unsigned, is equal to
value, if possible.value - a value between 0 and 255 inclusivebyte value that, when treated as unsigned, equals
valueIllegalArgumentException - if value is negative or greater
than 255public static byte saturatedCast(long value)
byte value that, when treated as unsigned, is nearest
in value to value.value - any long value(byte) 255 if value >= 255, (byte) 0 if
value <= 0, and value cast to byte otherwise@CheckReturnValue public static int compare(byte a, byte b)
byte values, treating them as unsigned
values between 0 and 255 inclusive. For example, (byte) -127 is
considered greater than (byte) 127 because it is seen as having
the value of positive 129.a - the first byte to compareb - the second byte to comparea is less than b; a positive
value if a is greater than b; or zero if they are equal@CheckReturnValue public static byte min(byte... array)
array.array - a nonempty array of byte valuesarray that is less than or equal to
every other value in the arrayIllegalArgumentException - if array is empty@CheckReturnValue public static byte max(byte... array)
array.array - a nonempty array of byte valuesarray that is greater than or equal
to every other value in the arrayIllegalArgumentException - if array is empty@Beta @CheckReturnValue public static String toString(byte x)
@Beta @CheckReturnValue public static String toString(byte x, int radix)
x for the given radix, where x is treated
as unsigned.x - the value to convert to a string.radix - the radix to use while working with xIllegalArgumentException - if radix is not between Character.MIN_RADIX
and Character.MAX_RADIX.@Beta public static byte parseUnsignedByte(String string)
byte value represented by the given decimal string.NumberFormatException - if the string does not contain a valid unsigned byte
valueNullPointerException - if s is null
(in contrast to Byte.parseByte(String))@Beta public static byte parseUnsignedByte(String string, int radix)
byte value represented by a string with the given radix.string - the string containing the unsigned byte representation to be parsed.radix - the radix to use while parsing stringNumberFormatException - if the string does not contain a valid unsigned byte
with the given radix, or if radix is not between Character.MIN_RADIX
and Character.MAX_RADIX.NullPointerException - if s is null
(in contrast to Byte.parseByte(String))@CheckReturnValue public static String join(String separator, byte... array)
byte values separated by
separator. For example, join(":", (byte) 1, (byte) 2,
(byte) 255) returns the string "1:2:255".separator - the text that should appear between consecutive values in
the resulting string (but not at the start or end)array - an array of byte values, possibly empty@CheckReturnValue public static Comparator<byte[]> lexicographicalComparator()
byte arrays
lexicographically. That is, it compares, using compare(byte, byte)), the first pair of values that follow any common
prefix, or when one array is a prefix of the other, treats the shorter
array as the lesser. For example, [] < [0x01] < [0x01, 0x7F] <
[0x01, 0x80] < [0x02]. Values are treated as unsigned.
The returned comparator is inconsistent with Object.equals(Object) (since arrays support only identity equality), but
it is consistent with Arrays.equals(byte[], byte[]).
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