Thursday, May 5, 2022

Question 17: Given a String, find the first repeated character in it using Stream functions?

import java.util.*; import*; import java.util.function.Function; public class JavaHungry { public static void main(String args[]) { String input = "Java Hungry Blog Alive is Awesome"; Character result = input.chars() // Stream of String .mapToObj(s -> Character.toLowerCase(Character.valueOf((char) s))) // First convert to Character object and then to lowercase .collect(Collectors.groupingBy(Function.identity(), LinkedHashMap::new, Collectors.counting())) //Store the chars in map with count .entrySet() .stream() .filter(entry -> entry.getValue() > 1L) .map(entry -> entry.getKey()) .findFirst() .get(); System.out.println(result); } }


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