如何随机获取 LinkedHashMap 的键和值？

Question

I'm trying to write a little vocabulary test. The LinkedHashMap vocabulary consists of vocabulary. They key is a french word and the value is an english word. I already have a GUI but I'm struggling to get a random french word from the vocabulary and its position to find out if the entered word is right. I tried to do it with an ArrayList but then I only get the value but I also need the key to show which word the person has to translate. Any help is appreciated.

LinkedHashMap<String, String> vocabulary = new LinkedHashMap<String, String>();

    Random random = new Random();
    int number = random.nextInt(ReadExcelFile.lastRowNumber);
    String value = (new ArrayList<String>(vocabulary.values())).get(number);

Answer 1

Put the keys into a list, then pick a random one:

// Do once after loading (or changing)
List<String> keyList = new ArrayList<>(vocabulary.keySet());

Random random = new Random();
int number = random.nextInt(vocabulary.size());
String key = keyList.get(number);
String value = vocabulary.get(key);

Answer 2

You can go in the following way!

Map<String, String> myMap = new LinkedHashMap<String, String>();
myMap.put("Bonjour", "Hello");
myMap.put("moi", "me");
myMap.put("tue", "you");
        
List<String> val = new ArrayList<String>(myMap.values());
int randomIndex = new Random().nextInt(val.size());
String randomValue = val.get(randomIndex);
            
System.out.println(randomValue);