Java Programs Made Easy

Q)...String encrption. replace the odd-index character with next character(if it is 'z' replace with 'a'..if 'a' with 'b' as such), 
leave the even index as such. return the encrypted string.

1. package Set1;
2. public class ClassSet37 {
3. public static void main(String[] args) {
4.  String s="preethi";
5.  System.out.println(oddEncryptionOfString(s));
6.  }
7. public static String oddEncryptionOfString(String s) {
8.  StringBuffer sb=new StringBuffer();
9.  for(int i=0;i<s.length();i++){
10.   char c=s.charAt(i);
11.   if(c%2!=0){
12.    c=(char)(c+1);
13.    sb.append(c);  }
14.   else
15.    sb.append(c);   }
16.  return sb.toString();
17. }
18. }