数的读法java 最简便的写法

以下是 Java 中最简便的将数字转化为中文读法的写法：

import java.util.Scanner;

public class Main {
    private static final String[] CN_NUMBERS = {"零", "一", "二", "三", "四", "五", "六", "七", "八", "九"};
    private static final String[] CN_UNITS = {"", "十", "百", "千", "万", "亿"};

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int num = scanner.nextInt();
        System.out.println(toChinese(num));
    }

    private static String toChinese(int num) {
        String result = "";
        int unit = 0;
        do {
            int part = num % 10000;
            if (part != 0) {
                StringBuilder sb = new StringBuilder();
                int n = part;
                int i = 0;
                while (n != 0) {
                    int d = n % 10;
                    if (d != 0) {
                        sb.insert(0, CN_NUMBERS[d] + CN_UNITS[i]);
                    } else if (sb.length() > 0 && !sb.substring(0, 1).equals("零")) {
                        sb.insert(0, CN_NUMBERS[0]);
                    }
                    n /= 10;
                    i++;
                }
                if (unit > 0) {
                    sb.append(CN_UNITS[unit]);
                }
                result = sb.toString() + result;
            }
            unit++;
            num /= 10000;
        } while (num > 0);
        return result;
    }
}

运行程序，输入一个整数，即可将其转化为中文读法。例如，输入 `12345`，输出结果是 `一万二千三百四十五`。