Length() and capacity()

The current length of a StringBuffer can be found through the length () method, although the total allocated capacity could be found by the capacity () method. They have the subsequent common forms:

int length()

int capacity()

//StringBuffer length vs. capacity.

class StringBufferDemo

{

public static void main(string args[]){

StringBuffer sb = new StringBuffer("Hello");

System.out.println("buffer =" +sb);

System.out.println("length =" +sb.length());

System.out.println("Capacity = " +sb.capacity());

}

}

The output of above given program that displays how StringBuffer reserves extra space for additional manipulations:

buffer = Hello

length = 5

capacity = 21

Because sb is initialized along with the string "Hello" whenever it is created, its length is 5. Its capacity is 21 since room for 16 further characters is automatically added.