My Favorite Join Function

My favorite implementation of a join function (in Java):

public static <T> String join(T[] array, String delimiter)
{
    if (array.length == 0)
        return "";
    StringBuilder builder = new StringBuilder();
    builder.append(array[0]);
    for (int i = 1; i < array.length; i++)
        builder.append(delimiter).append(array[i]);
    return builder.toString();
}