ArrayUtils.java

package com.grendelscan.commons;

public class ArrayUtils
{

    public static byte[] copyOf(final byte[] original)
    {
        return copyOfRange(original, 0, original.length);
    }

    public static byte[] copyOfRange(final byte[] original, final int from, final int to)
    {
        if (from < 0 || from > original.length)
        {
            throw new ArrayIndexOutOfBoundsException(from + " is less than zero or greater than the length of " + original.length);
        }
        if (from > to)
        {
            throw new IllegalArgumentException(from + " is greater than " + to);
        }
        int length = to - from + 1;
        byte[] copy = new byte[length];
        for (int i = 0; i < copy.length; i++)
        {
            if (i + from >= original.length)
            {
                copy[i] = 0;
            }
            else
            {
                copy[i] = original[i + from];
            }
        }
        return copy;
    }

}