Review

class ArrayUtils {
    /**
     * <p>Finds the last index of the given value in the array starting at the given index.</p>
     *
     * <p>This method returns {@link #INDEX_NOT_FOUND} (<code>-1</code>) for a <code>null</code> input array.</p>
     *
     * <p>A negative startIndex will return {@link #INDEX_NOT_FOUND} (<code>-1</code>). A startIndex larger than the 
     * array length will search from the end of the array.</p>
     * 
     * @param array  the array to traverse for looking for the object, may be <code>null</code>
     * @param valueToFind  the value to find
     * @param startIndex  the start index to travers backwards from
     * @return the last 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 lastIndexOf(double[] array, double valueToFind, int startIndex) {
        if (ArrayUtils.isEmpty(array)) {
            return INDEX_NOT_FOUND;
        }
        if (startIndex < 0) {
            return INDEX_NOT_FOUND;
        } else if (startIndex >= array.length) {
            startIndex = array.length - 1;
        }
        for (int i = startIndex; i >= 0; i--) {
            if (valueToFind == array[i]) {
                return i;
            }
        }
        return INDEX_NOT_FOUND;
    }

}