Review

class ArrayUtils {
    /**
     * <p>Finds the index of the given value in the array.</p>
     *
     * <p>This method returns {@link #INDEX_NOT_FOUND} (<code>-1</code>) for a <code>null</code> input array.</p>
     * 
     * @param array  the array to search through for the object, may be <code>null</code>
     * @param valueToFind  the value to find
     * @return the index of the value within the array,
     *  {@link #INDEX_NOT_FOUND} (<code>-1</code>) if not found or <code>null</code> array input
     */
    public static int indexOf(int[] array, int valueToFind) {
        return indexOf(array, valueToFind, 0);
    }

}