@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<Byte> |
asList(byte... backingArray)
Returns a fixed-size list backed by the specified array, similar to
Arrays.asList(Object[]). |
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 void |
reverse(byte[] array)
Reverses the elements of
array. |
static void |
reverse(byte[] array,
int fromIndex,
int toIndex)
Reverses the elements of
array between fromIndex inclusive and toIndex
exclusive. |
static byte[] |
toArray(Collection<? extends Number> collection)
Returns an array containing each value of
collection, converted to a byte value
in the manner of Number.byteValue(). |
public static int hashCode(byte value)
value; equal to the result of invoking ((Byte)
value).hashCode().
Java 8 users: use Byte.hashCode(byte) instead.
value - a primitive byte valuepublic 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 emptytarget - a primitive byte valuetrue if array[i] == target for some value of ipublic static int indexOf(byte[] array, byte target)
target in array.array - an array of byte values, possibly emptytarget - a primitive byte valuei 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 Arrays.copyOfRange(array,
i, i + target.length) contains exactly the same elements as target.
array - the array to search for the sequence targettarget - the array to search for as a sub-sequence of arraypublic static int lastIndexOf(byte[] array, byte target)
target in array.array - an array of byte values, possibly emptytarget - a primitive byte valuei 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 arrayspublic 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 arrayminLength - the minimum length the returned array must guaranteepadding - an extra amount to "grow" the array by if growth is necessaryarray, with guaranteed minimum length minLengthIllegalArgumentException - if minLength or padding is negativepublic 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 instancescollection, in the same order, converted
to primitivesNullPointerException - if collection or any of its elements is nullCollection<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 listpublic static void reverse(byte[] array)
array. This is equivalent to Collections.reverse(Bytes.asList(array)), but is likely to be more efficient.public static void reverse(byte[] array, int fromIndex, int toIndex)
array between fromIndex inclusive and toIndex
exclusive. This is equivalent to Collections.reverse(Bytes.asList(array).subList(fromIndex, toIndex)), but is likely to be more
efficient.IndexOutOfBoundsException - if fromIndex < 0, toIndex > array.length, or
toIndex > fromIndexCopyright © 2010–2020. All rights reserved.