01. Count Real Numbers

package associativeArrays;

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

public class P01CountRealNumbers {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        List<Double> numbersList = Arrays.stream(scanner.nextLine().split(" "))
                .map(Double::parseDouble)
                .collect(Collectors.toList());

        Map<Double, Integer> countNumbersMap = new TreeMap<>();
        for (double currentNum : numbersList) {
            countNumbersMap.putIfAbsent(currentNum, 0);
            int currentValue = countNumbersMap.get(currentNum);
            countNumbersMap.put(currentNum, currentValue + 1);


//            Integer currentValue = countNumbersMap.get(currentNum);
//            if (countNumbersMap.containsKey(currentNum)) {
//                countNumbersMap.put(currentNum, currentValue + 1);
//            } else {
//                countNumbersMap.put(currentNum, 1);
//            }
        }

        for (Map.Entry<Double, Integer> entry : countNumbersMap.entrySet()) {
            System.out.printf("%.0f -> %d%n", entry.getKey(), entry.getValue());
        }

    }
}