Java 8 # FindFirstNonRepeated Character

import java.util.*;
import java.util.function.Function;
import java.util.stream.Collectors;

public class FirstNonRepeated {
        public static void main(String[] args) {
        String input = "swiss";

        /*Character result = findFirstNonRepeated(input);
        System.out.println("First non-repeated character: " + result);*/
        Character result = input.chars()
                .mapToObj(c -> (char)c)
                .filter(ch -> input.indexOf(ch) == input.lastIndexOf(ch))
                .findFirst()
                .orElse(null);
        System.out.println("result ******   :"+result);
    }
}