How many characters are there in java?

Question

are there 65536 because Character.MAX_VALUE when converted to int gives 65535?

Answer 1

What do you mean by character. If you mean by char data type or string data type. There are 256 character in ASCII code. And this is a standard.
If you mean length of a variable than it is  2^31-1.
Please explain your problem if I did not understand it with example.