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  1. import java.util.*;
  2.  
  3. class Ideone
  4. {
  5.     public static int uniqueCount(String str) 
  6.     {
  7.        HashSet<Character> al = new HashSet<Character>();
  8.        char[] arr= str.toCharArray();
  9.        for (int i=0; i<arr.length; i++) 
  10.        {
  11.           al.add(arr[i]);  
  12.        }
  13.        return al.size() ;
  14.     }  
  15.  
  16.  
  17.     public static void main(String args[])
  18.     {
  19.        Scanner sc = new Scanner(System.in);
  20.        String str = sc.next();
  21.        System.out.println(uniqueCount(str));
  22.  
  23.     }
  24. }
  25.  
Success #stdin #stdout 0.05s 4386816KB
comments (?)
stdin 
aabbccd
stdout 
4
https://ideone.com/2NIN8V
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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