StringBuffer Insert() in Java Example

StringBuffer insert (int index, char [] str, int offset, int len) :This method inserts a substring into the StringBuffer object starting at position index. The substring is the string representation of len characters from the str []array starting at index position offset.

For example,

char[] chArr ={‘D’,’i’,’n’,’e’,’s’,’h’,’ ‘};

StringBuffer s2 = new StringBuffer(“Mr Thakur”);

s2.insert(3,chArr,0,7);

As a result, characters from chArr array starting from position 0 will be inserted in the invoking

string buffer at the position 3.So the resulting string buffer will be “ Mr Dinesh Thakur “.

public class StringBufferInsert 
 { 
           public static void main(String[] args) 
       { 
              StringBuffer s1 = new StringBuffer("Welcome Java"); 
              s1.insert(7," to"); 
              System.out.println("sl : " +s1); 
              StringBuffer s2 = new StringBuffer("Mr Thakur"); 
              char[] chArr ={'D','i','n','e','s','h',' '}; 
              s2.insert(3,chArr,0,7); 
              System.out.println("s2 : " + s2); 
           } 
 }