Find occurrences of characters in a Java String [duplicate]

Answer 1

public static void main(String[] args) throws IOException
    {
        //String s1="parasanna";
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        System.out.println("enter string:");
        String s1 = br.readLine();
        StringBuffer sb=new StringBuffer(s1);

        while(sb.length() != 0)
        {
           char c = sb.charAt(0);
           int cnt = 0;
           for(int i=0; i< sb.length(); i++)
           {
           if(c == sb.charAt(i))
           {
               cnt++;
               sb.deleteCharAt(i);
               i--;
           }

           }

           System.out.println(c + "     occurance is:" + cnt);
        }

    }