public class Q8{ public static void main(String []arg){ StringBuffer str=new StringBuffer("This cannot be"); int i,numChars; System.out.println("\n\nThe Original Sring is : "+str); numChars=str.length(); System.out.println("This Srting has "+numChars+" charactors"); str.insert(4,"I know"); //insert Characters System.out.println("The Srting, After insertion, is now: "+str); str.replace(12,18,"to"); //replace Characters System.out.println("The Srting, After replacement, is now: "+str); str.append("correct"); //append Characters System.out.println("The Srting, After appending, is now: "+str); str.reverse(); //reverse the characters System.out.println("The Srting, After Reversing, is now: "+str); System.out.println("\n\n"); } }