map stream

package com.example.demo;

import java.time.LocalDate;
import java.util.HashMap;
import java.util.Map;

public class Test {
    public static void main(String[] args) {

        Map<LocalDate,String> future = new HashMap<>();
        future.put(LocalDate.now().minusDays(1), "1");//{2022-12-05=1}
        future.put(LocalDate.now(), "2");//{2022-12-06=2}
        future.put(LocalDate.now().plusDays(1), "3");//{2022-12-07=3}
        future.put(LocalDate.now().plusDays(2), "4");//{2022-12-08=4}
        future.put(LocalDate.now().plusDays(3), "5");//{2022-12-09=5}
//        future.entrySet().stream()
//                .filter(e -> e.getKey().isAfter(LocalDate.now()))
//                .sorted(Map.Entry.comparingByKey())
//                .forEach(e -> System.out.println(e));
//        2022-12-07=3
//        2022-12-08=4
//        2022-12-09=5

        Map<LocalDate,String> futureDates = future.entrySet().stream()
                .filter(e -> e.getKey().isAfter(LocalDate.now()))
                //.collect(Collectors.toMap(e -> e.getKey(), e -> e.getValue(), (key1, key2) -> key2));
                .collect(HashMap::new,(m, e)->m.put(e.getKey(),e.getValue()),HashMap::putAll);
        System.out.println(futureDates);//{2022-12-09=5, 2022-12-08=4, 2022-12-07=3}
    }
}