What is the difference between a Character Array and a String?

Question

Spending my time on high level languages it suddenly occurred to me that I did not know the difference between a Character Array and a String. I think they are the same thin

Answer 1

String is a class in java. So it has attributes e.g. length. So when you ask for the size of string it simply returns that instead of computing the value each time. It also other methods e.g. indexOf, substring, etc to make life easy so you don't have to do that yourself.