STRING BUFFER

  In Java, StringBuffer class is also used for string handling.

  String creates string of fixed length;StringBuffercreates strings of flexible length that can be modified both in length and content.

  StringBuffer may be declared and created as follows:

StringBuffer str;

str=new StringBuffer(“String”);

Ex:   StringBuffer fname;

         fname=new StringBuffer(“Santosh”);

         StringBuffer fname=new StringBuffer (“Santosh”);

  It is possible to insert character and substrings in the middle of a string, or append another string at the end.

  Some of the common methods used for string manipulation are as follows:

Method	Task
s1.setCharAt (n, ’x’);	Modifies the nth character to ‘x’.
s1.append (s2);	Appends the string s2 to s1 at the end.
s1.insert (n, s2);	Inserts the string s2 at the position n of the string s1.
s1.setLength( n );	If n>s1.length() zeros are added to s1.