Answer:
Yes, this would work.
StringBuffer
The reversed String could be built up character by character in an array.
Since arrays can be altered at any time,
only one new object would
be constructed.
This is essentially the idea of the StringBuffer class.
A StringBuffer object holds characters that
can be changed by appending and by inserting characters.
Also, a StringBuffer object includes
many useful character manipulation methods.
Constructors for StringBuffer are:
| StringBuffer constructors | |
|---|---|
| public StringBuffer() | create an empty StringBuffer |
| public StringBuffer(int capacity) | create a StringBuffer with initial room for capacity characters |
| public StringBuffer(String st) | create a StringBuffer containing the characters from st |
If you insert characters into a StringBuffer,
it automatically grows to the length you need.
QUESTION 6:
Why would you ever want a StringBuffer with length zero?