通过1值获取2个键java hashmap

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

public class Main {
    public static void main(String[] args) {
        HashMap<String, Integer> map = new HashMap<>();
        map.put("key1", 1);
        map.put("key2", 2);
        map.put("key3", 2);
        map.put("key4", 3);

        String targetValue = "2";
        String key1 = null;
        String key2 = null;

        for (Map.Entry<String, Integer> entry : map.entrySet()) {
            if (entry.getValue().toString().equals(targetValue)) {
                if (key1 == null) {
                    key1 = entry.getKey();
                } else {
                    key2 = entry.getKey();
                    break;
                }
            }
        }

        System.out.println("Key 1: " + key1);
        System.out.println("Key 2: " + key2);
    }
}