Java Unicode Characters

Question

我熟悉ascii的问题。问题是我没有在 unicode 字符中遇到相同问题的经验。例如，如何在给定包含单词的字符串数组的情况下返回最常出现的单词？提前感谢！

p.s.：您始终可以使用长度为"256"的数组来表示ASCII中的所有字符，而在Unicode方面则无法做到这一点。HashMap是解决问题的必备和最佳方法吗？我听说有更好的方法来解决它。以下是我能想到的：

    String str = "aa df ds df df"; // assume they are Unicode
    String[] words = str.split(" ");
    HashMap<String, Integer> map  = new HashMap<String, Integer>();
    for (String word : words){
        if (map.containsKey(word)){
            int f = map.get(word);
            map.put(word, f+1);
        } else{
            map.put(word, 1);
        }
    }
    int max = 0;
    String maxWord = ""; 
    for (String word : words){
        int f = map.get(word);
        if (f > max){
            max = f;
            maxWord = word;
        }
    }
    System.out.println(maxWord + " " +max);

Answer 1

// Inspired by GameKyuubi. It can be solved using array sort and count the most frequently used word using constatnt space. 
    Arrays.sort(words);
    int max = 0;
    int count = 0;
    String maxWord = "";
    String prev = "";
    for (String word : words){
        if (prev.equals("") || word.equals(prev)){
            count++;
        } else{
            count = 1;
        }
        if (max < count){
            max = count;
            maxWord = word;
        }
        prev = word;
    }
    System.out.println(maxWord + " " +max);