Module com.github.f4b6a3.uuid

Package com.github.f4b6a3.uuid.util.internal

Class ByteUtil

java.lang.Object

com.github.f4b6a3.uuid.util.internal.ByteUtil

public final class ByteUtil
extends Object

Utility class that contains many static methods for byte handling.

Method Summary

Modifier and Type	Method	Description
static byte[]	fromInts(int[] ints)	Converts an array of integers into an array of bytes.
static String	toHexadecimal(byte[] bytes)	Get a hexadecimal string from given array of bytes.
static int[]	toInts(byte[] bytes)	Converts an array of bytes into an array of integers.
static long	toNumber(byte[] bytes)	Get a number from a given array of bytes.
static long	toNumber(byte[] bytes, int start, int end)	Get a number from a given array of bytes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

toNumber

public static long toNumber(byte[] bytes)

Get a number from a given array of bytes.

Parameters:

bytes - a byte array

Returns:

a long

toNumber

public static long toNumber(byte[] bytes,
                            int start,
                            int end)

Get a number from a given array of bytes.

Parameters:

bytes - a byte array

start - first byte of the array

end - last byte of the array (exclusive)

Returns:

a long

toHexadecimal

public static String toHexadecimal(byte[] bytes)

Get a hexadecimal string from given array of bytes.

Parameters:

bytes - byte array

Returns:

a string

toInts

public static int[] toInts(byte[] bytes)

Converts an array of bytes into an array of integers. Each integer is formed by combining 4 bytes from the input array. This method assumes that the input byte array is at least 16 bytes long. The conversion is done by treating each set of 4 bytes as a single integer, with the first byte being the most significant.

Parameters:

bytes - An array of bytes to be converted into integers. This array should be at least 16 bytes long.

Returns:

An array of 4 integers, where each integer is formed by combining 4 bytes from the input array.

fromInts

public static byte[] fromInts(int[] ints)

Converts an array of integers into an array of bytes. Each integer is decomposed into 4 bytes, with the most significant byte being placed first. This method produces a byte array of length 16, assuming the input array contains exactly 4 integers. The conversion is performed by shifting and masking operations to extract each byte from the integers.

Parameters:

ints - An array of integers to be converted into bytes. This array should contain exactly 4 integers.

Returns:

A byte array of length 16, where each group of 4 bytes represents one of the integers from the input array.