Rapid Miner Execute Script Help

Hey Im new in Rapid Miner and I have a problem . I will get tweet of today and after that ı have got to generate a new column "Number of Words".And I've gotta Split to Words Tweets,and ı will count that how much words after that ı will add  the count to own row.And ı will do it for each tweets at my dataset.And the most important thing;ı must do all of that with Execute Script...Like ı said Im new in Rapid Miner but I wanna learn it.I know Java and ı should use Java with Execute Script...Please Help me:\