Java Programming

The "Write" methods in the OutputStream class accept only arrays of type byte or int. I would however like to send other types such as String. Any idea how I can do that?
I was told that maybe I could cast using wrapper classes but I'm not sure how it can be done.

Also, Is there any way that I could use ArrayLists, etc to send data instead of an Array? I tried, it didn't work but I thought maybe there's a way to go around it.

Your help is very much appreciated.