import java.util.Collections;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.ArrayList;

public class Main {

public static void main(String[] args) {

Map<Integer,Integer> map1 = new HashMap<>();

Map<Integer,Integer> map2 = new HashMap<>();

map1.put(1,9);

map1.put(2,7);

map1.put(3,4);

map1.put(4,0);

map1.put(5,1);

List<Integer> list= new ArrayList<>();

list.add(1);

list.add(2);

list.add(3);

list.add(4);

list.add(5);

Collections.sort(list, (o1, o2) -> (map1.get(o1)).compareTo(map1.get(o2)));

System.out.println(list.toString());

}

}