Java Programs Made Easy

Q)... Find no of characters in a given string which are not repeated.
input: "hello"
output: 3

1. package Set1;
2. public class ClassSet26 {
3. public static int noOfnonRepeatedCharacters(String s1){
4.   StringBuffer sb=new StringBuffer(s1);
5.   for(int i=0;i<sb.length();i++){
6.    int n=0;
7.    for(int j=i+1;j<sb.length();j++)
8.     if(sb.charAt(i)==sb.charAt(j)){
9.      sb.deleteCharAt(j);
10.      n++; }
11.     if(n>0){
12.      sb.deleteCharAt(i);
13.      i--;}  }
14.   return sb.length();
15.  }
16. public static void main(String[] args) {
17.   String s1="preethi";
18.   System.out.println(noOfnonRepeatedCharacters(s1));
19.  }
20. }