com.myjavatools.lib
Class Bytes

java.lang.Object
  com.myjavatools.lib.Bytes

public abstract class Bytes
extends java.lang.Object

Constructor Summary

Bytes()

Method Summary

static long	crc32(byte[] data) Calculates crc32 on a byte array
static long	crc32(byte[] data, int off, int len) Calculates crc32 on a byte array
static byte[]	toBytes(char[] from) Converts char array to byte array (per-element casting)
static byte[]	toBytes(long from) Converts long to byte array (lower bytes first)
static char[]	toChars(byte[] from) Converts byte array to char array (per-element casting)

Methods inherited from class java.lang.Object

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

Constructor Detail

Bytes

public Bytes()

Method Detail

toBytes

public static final byte[] toBytes(char[] from)

Converts char array to byte array (per-element casting)

Parameters:

from - char array

Returns:

byte array

Example:

toBytes(new char[] {0x0123, 0x4567, 0x89ab, 0xcdef}) returns {0x23, 0x67, (byte)0xab, (byte)0xef}.

toChars

public static final char[] toChars(byte[] from)

Converts byte array to char array (per-element casting)

Parameters:

from - byte array

Returns:

char array

Example:

toChars(new byte[] {0x23, 0x67, (byte)0xab, (byte)0xef}) returns new char[] {0x23, 0x67, 0xab, 0xef}.

crc32

public static final long crc32(byte[] data)

Calculates crc32 on a byte array

Parameters:

data - source bytes

Returns:

its crc32

Example:

crc32(new byte[] {1, 2, 3}) returns 1438416925.

crc32

public static final long crc32(byte[] data,
                               int off,
                               int len)

Calculates crc32 on a byte array

Parameters:

data - source bytes

off - offset in the array

len - length of the area to crc

Returns:

its crc32

Example:

crc32(new byte[] {0, 1, 2, 3, 4}, 1, 3) returns 1438416925.

toBytes

public static final byte[] toBytes(long from)

Converts long to byte array (lower bytes first)

Parameters:

from - the long value

Returns:

byte array

Example:

toBytes(0x0123456789abcdefl) returns {(byte)0xef, (byte)0xcd, (byte)0xab, (byte)0x89, 0x67, 0x45, 0x23, 0x01}.