JAVA HashMap 2D,无法获得制作2D HashMap的正确方法,我的意思是将HashMap转换为另一个HashMap

import java.util.Collections;

// ...

public static HashMap<String, String> reverseHashMap(HashMap<String, String> map) {
    HashMap<String, String> reversedMap = new HashMap<>();

    for (Map.Entry<String, String> entry : map.entrySet()) {
        reversedMap.put(entry.getValue(), entry.getKey());
    }

    return Collections.reverse(reversedMap.entrySet());
}

// Usage
HashMap<String, String> originalMap = new HashMap<>();
// Add values to the map
originalMap.put("Key1", "Value1");
originalMap.put("Key2", "Value2");
originalMap.put("Key3", "Value3");

HashMap<String, String> reversedMap = reverseHashMap(originalMap);
// The reversed map is now:
// {"Value3": "Key2", "Value2": "Key1", "Value1": "Key3"}

import java.util.HashMap;

// ...

public static void reverseHashMap(HashMap<String, String> map) {
    HashMap<String, String> reversedMap = new HashMap<>();

    for (Map.Entry<String, String> entry : map.entrySet()) {
        String key = entry.getKey();
        String value = entry.getValue();
        reversedMap.put(value, key);
    }
}

// Usage
HashMap<String, String> originalMap = new HashMap<>();
// Add values to the map
originalMap.put("Key1", "Value1");
originalMap.put("Key2", "Value2");
originalMap.put("Key3", "Value3");

reverseHashMap(originalMap);
// The original map is now:
// {"Key3": "Value1", "Key1": "Value2", "Key2": "Value3"}