@GwtCompatible public final class Bytes extends Object
byte primitives, that are not already found in either
Byte or
Arrays,
and interpret bytes as neither signed nor unsigned. The methods which specifically treat bytes as signed or unsigned are found in
SignedBytes and
UnsignedBytes.
See the Guava User Guide article on primitive utilities.
| Modifier and Type | Method and Description |
|---|---|
static List |
asList(byte... backingArray)
Returns a fixed-size list backed by the specified array, similar to
Arrays.
|
static byte[] |
concat(byte[]... arrays)
Returns the values from each provided array combined into a single array.
|
static boolean |
contains(byte[] array, byte target)
Returns
true if
target is present as an element anywhere in
array.
|
static byte[] |
ensureCapacity(byte[] array, int minLength, int padding)
Returns an array containing the same values as
array, but guaranteed to be of a specified minimum length.
|
static int |
hashCode(byte value)
Returns a hash code for
value; equal to the result of invoking
((Byte) value).hashCode().
|
static int |
indexOf(byte[] array, byte target)
Returns the index of the first appearance of the value
target in
array.
|
static int |
indexOf(byte[] array, byte[] target)
Returns the start position of the first occurrence of the specified
target within
array, or
-1 if there is no such occurrence.
|
static int |
lastIndexOf(byte[] array, byte target)
Returns the index of the last appearance of the value
target in
array.
|
static byte[] |
toArray(Collection
Returns an array containing each value of
collection, converted to a
byte value in the manner of
Number.
|
public static int hashCode(byte value)
value; equal to the result of invoking
((Byte) value).hashCode().
value - a primitive
byte value
public static boolean contains(byte[] array,
byte target)
true if
target is present as an element anywhere in
array.
array - an array of
byte values, possibly empty
target - a primitive
byte value
true if
array[i] == target for some value of
i
public static int indexOf(byte[] array,
byte target)
target in
array.
array - an array of
byte values, possibly empty
target - a primitive
byte value
i for which
array[i] == target, or
-1 if no such index exists.
public static int indexOf(byte[] array,
byte[] target)
target within
array, or
-1 if there is no such occurrence.
More formally, returns the lowest index i such that java.util.Arrays.copyOfRange(array, i, i + target.length) contains exactly the same elements as target.
array - the array to search for the sequence
target
target - the array to search for as a sub-sequence of
array
public static int lastIndexOf(byte[] array,
byte target)
target in
array.
array - an array of
byte values, possibly empty
target - a primitive
byte value
i for which
array[i] == target, or
-1 if no such index exists.
public static byte[] concat(byte[]... arrays)
concat(new byte[] {a, b}, new byte[] {}, new byte[] {c} returns the array
{a, b, c}.
arrays - zero or more
byte arrays
public static byte[] ensureCapacity(byte[] array,
int minLength,
int padding)
array, but guaranteed to be of a specified minimum length. If
array already has a length of at least
minLength, it is returned directly. Otherwise, a new array of size
minLength + padding is returned, containing the values of
array, and zeroes in the remaining places.
array - the source array
minLength - the minimum length the returned array must guarantee
padding - an extra amount to "grow" the array by if growth is necessary
array, with guaranteed minimum length
minLength
IllegalArgumentException - if
minLength or
padding is negative
public static byte[] toArray(Collection<? extends Number > collection)
collection, converted to a
byte value in the manner of
Number.byteValue() .
Elements are copied from the argument collection as if by collection.toArray(). Calling this method is as thread-safe as calling that method.
collection - a collection of
Number instances
collection, in the same order, converted to primitives
NullPointerException - if
collection or any of its elements is null
Collection<Byte> before 12.0)
public static List<Byte > asList(byte... backingArray)
Arrays.asList(Object[]) . The list supports
List.set(int, Object) , but any attempt to set a value to
null will result in a
NullPointerException.
The returned list maintains the values, but not the identities, of Byte objects written to or read from it. For example, whether list.get(0) == list.get(0) is true for the returned list is unspecified.
backingArray - the array to back the list