First, please change your subject to something more appropriate. I suggest "converting Java string arrays to character arrays."
Second, two question:
- is this homework?
- what should the end result be?
I really don't have a clear picture of what you're trying to end up with. However, it looks like coming up with the solution yourself (hint: Java's API documentation describes the String class' toCharArray method) might be easier than explaining it more clearly. When you do have a solution, post it.