用于对地图中的地图值进行排序的Java8

import java.util.HashMap;
import java.util.Map;
import java.util.stream.Collectors;

public class MapSortingExample {
    public static void main(String[] args) {
        Map<String, Integer> map = new HashMap<>();
        map.put("A", 5);
        map.put("B", 2);
        map.put("C", 9);
        map.put("D", 1);

        // 对地图的值进行排序
        Map<String, Integer> sortedMap = map.entrySet()
                .stream()
                .sorted(Map.Entry.comparingByValue())
                .collect(Collectors.toMap(
                        Map.Entry::getKey,
                        Map.Entry::getValue,
                        (oldValue, newValue) -> oldValue,
                        HashMap::new
                ));

        // 输出排序后的地图值
        sortedMap.forEach((key, value) -> System.out.println(key + " -> " + value));
    }
}

D -> 1
B -> 2
A -> 5
C -> 9