@CheckReturnValue @GwtCompatible public final class Bytes extends Object
Static utility methods pertaining to 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 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)
Returns a hash code for value; equal to the result of invoking ((Byte) value).hashCode().
value - a primitive byte valuepublic static boolean contains(byte[] array,
byte target)
Returns 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)
Returns the index of the first appearance of the value 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)
Returns the start position of the first occurrence of the specified 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 targettarget - the array to search for as a sub-sequence of arraypublic static int lastIndexOf(byte[] array,
byte target)
Returns the index of the last appearance of the value 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)
Returns the values from each provided array combined into a single array. For example, 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)
Returns an array containing the same values as 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)
Returns an array containing each value of 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)
Returns a fixed-size list backed by the specified array, similar to 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