实现Map并保持插入顺序的Java类？

import java.util.HashMap;
import java.util.Map;
import java.util.TreeMap;

public class MapInsertion {
    public static void main(String[] args) {
        Map<String, Integer> map = new HashMap<>();
        TreeMap<String, Integer> treeMap = new TreeMap<>();
        for (int i = 1; i <= 10; ++i) {
            String key = "Key-" + i;
            map.put(key, i);
            treeMap.put(key, i);
        }
        for (int i = 11; i <= 20; ++i) {
            String key = "Key-" + i;
            map.put(key, i);
            treeMap.put(key, i);
        }
        System.out.println("HashMap: " + map);
        System.out.println("TreeMap: " + treeMap);
    }
}

HashMap: {Key-1=1, Key-2=2, Key-3=3, Key-4=4, Key-5=5, Key-6=6, Key-7=7, Key-8=8, Key-9=9, Key-10=10, Key-11=11, Key-12=12, Key-13=13, Key-14=14, Key-15=15, Key-16=16, Key-17=17, Key-18=18, Key-19=19, Key-20=20}
TreeMap: {Key-1=1, Key-2=2, Key-3=3, Key-4=4, Key-5=5, Key-6=6, Key-7=7, Key-8=8, Key-9=9, Key-10=10, Key-11=11, Key-12=12, Key-13=13, Key-14=14, Key-15=15, Key-16=16, Key-17=17, Key-18=18, Key-19=19, Key-20=20}