What is the capacity of a StringBuffer?

Question

When I run this code:

StringBuffer name = new StringBuffer("stackoverflow.com");
System.out.println("Length: " + name.length() + ", capacity: " + name.capacity());

it gives output:

Length: 17, capacity: 33

Obvious length is related to number of characters in string, but I am not sure what capacity is? Is that number of characters that StringBuffer can hold before reallocating space?

Answer 1

Yes, it's exactly that. You can think of StringBuffer as being a bit like a Vector<char> in that respect (except obviously you can't use char as a type argument in Java...)