ch.bind.philib.lang

Class ArrayUtil

java.lang.Object

ch.bind.philib.lang.ArrayUtil

public abstract class ArrayUtil
extends Object

Various functions for dealing with arrays which are not present in the standard Arrays class.

Since:

2009-06-10

Author:

Philipp Meinen

Field Summary

Fields

Modifier and Type	Field and Description
static byte[]	EMPTY_BYTE_ARRAY

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ArrayUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static byte[]	concat(byte[] a, byte[] b)
static byte[]	extractBack(byte[] data, int len)
static byte[]	extractFront(byte[] data, int len)
static String	formatShortHex(byte[] data)
static String	formatShortHex(byte[] data, int off, int len)
static String	formatShortHex(ByteBuffer data)
static <T> void	pickRandom(T[] source, T[] destination) Fills the destination array with randomly picked values from the source array.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_BYTE_ARRAY

public static final byte[] EMPTY_BYTE_ARRAY

Constructor Detail

ArrayUtil

protected ArrayUtil()

Method Detail

pickRandom

public static <T> void pickRandom(T[] source,
                  T[] destination)

Fills the destination array with randomly picked values from the source array. No value will be picked twice.

Parameters:

source - The array from which random values must be picked. The content of this array will not be altered.

destination - The array which must be filled with random values. Previous values within this array will be overwritten.

Throws:

NullPointerException - If either of the two parameters is null.

IllegalArgumentException - If the source-array is smaller then the destination -array.

concat

public static byte[] concat(byte[] a,
            byte[] b)

extractBack

public static byte[] extractBack(byte[] data,
                 int len)

extractFront

public static byte[] extractFront(byte[] data,
                  int len)

formatShortHex

public static String formatShortHex(byte[] data)

formatShortHex

public static String formatShortHex(byte[] data,
                    int off,
                    int len)

formatShortHex

public static String formatShortHex(ByteBuffer data)