[Java Basics][Collections-HW] 12. Cards Frequencies

import java.util.Scanner;
import java.util.LinkedHashMap;

public class CardsFrequencies {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        String input = sc.nextLine();
        String[] cards = input.split("\\W+");
        LinkedHashMap<String, Integer> cardsMap = new LinkedHashMap<>();

        for (int i = 0; i < cards.length; i++) {
            if(!cardsMap.containsKey(cards[i])){
                cardsMap.put(cards[i], 1);
            }
            else {
                cardsMap.put(cards[i], cardsMap.get(cards[i]) + 1);
            }
        }

        for (String key : cardsMap.keySet()) {
            System.out.printf(key + " -> " + "%.2f%%",
                             ((double)cardsMap.get(key) / cards.length * 100));
            System.out.println();
        }
    }
}