在Java中将数字转换为字符串中的单词

import java.util.HashMap;

public class NumberToWordConverter {
    private static final HashMap<Character, String> wordMap = new HashMap<>();

    static {
        wordMap.put('0', "zero");
        wordMap.put('1', "one");
        wordMap.put('2', "two");
        wordMap.put('3', "three");
        wordMap.put('4', "four");
        wordMap.put('5', "five");
        wordMap.put('6', "six");
        wordMap.put('7', "seven");
        wordMap.put('8', "eight");
        wordMap.put('9', "nine");
    }

    public static String convertNumberToWord(int number) {
        String numberString = Integer.toString(number);
        char[] digits = numberString.toCharArray();
        StringBuilder wordBuilder = new StringBuilder();

        for (char digit : digits) {
            String word = wordMap.get(digit);
            wordBuilder.append(word).append(" ");
        }

        return wordBuilder.toString().trim();
    }

    public static void main(String[] args) {
        int number = 12345;
        String word = convertNumberToWord(number);
        System.out.println(word);
    }
}