Join strings with different separators in Java

I have a list of strings, e.g. days of the week. And I'd like to join them on comma, with "and" before the last element. E.g: "I'm available on Tue, Wed, Thu and Fri".

Something elegant like

Joiner.on(", ").join(days)

Does not work. Is there an elegant way to do it with Guava or similar library?

Thanks

Java 6/7 compatible solution using Guava:

static String join(List<String> strings, String separator, String lastSeparator)
{
    checkNotNull(strings);
    switch (strings.size()) {
        case 0:
            return "";
        case 1:
            return strings.get(0);
        default:
            return Joiner.on(separator).join(strings.subList(0, strings.size() - 1))
                    + lastSeparator + strings.get(strings.size() - 1);
    }
}

or if you want to accept Iterable (and / or use more Guava stuff):

static String join(Iterable<String> strings, String separator, String lastSeparator)
{
    checkNotNull(strings);
    int size = Iterables.size(strings);
    switch (size) {
        case 0:
            return "";
        case 1:
            return strings.iterator().next();
        default:
            return Joiner.on(separator).join(Iterables.limit(strings, size - 1))
                    + lastSeparator + Iterables.getLast(strings);
    }
}

It handles all edge cases except null elements in strings - if you want to handle them and not throw NPE, add .useForNull(stringForNull) to your joiner.