如何在另一个map中进行映射，以获取每个第一个map的索引？

import java.util.*;

public class MapMappingExample {
    public static void main(String[] args) {
        Map<String, Integer> map1 = new HashMap<>();
        map1.put("A", 1);
        map1.put("B", 2);
        map1.put("C", 3);

        Map<Integer, String> map2 = new HashMap<>();
        map2.put(1, "X");
        map2.put(2, "Y");
        map2.put(3, "Z");

        List<String> indexes = new ArrayList<>();

        for (Map.Entry<String, Integer> entry : map1.entrySet()) {
            String key = entry.getKey();
            Integer value = entry.getValue();

            for (Map.Entry<Integer, String> entry2 : map2.entrySet()) {
                Integer key2 = entry2.getKey();
                String value2 = entry2.getValue();

                if (value.equals(key2)) {
                    indexes.add(key);
                }
            }
        }

        System.out.println("Indexes: " + indexes);
    }
}