中文數字

中文數字.java

    private static final char[] digits = new char[] { '零', '一', '二', '三', '四', '五', '六', '七', '八', '九' };
    private static final Character[] little = new Character[] { null, '十', '百', '千' };
    private static final Character[] big = new Character[] { null, '萬', '億', '兆', '京' };
    
    private static void out(Character c) {
        if (c == null)
            return;
        System.out.println(c);
    }
    private static void chineseNumbers(long n) {
        int pow = 0;
        Character pendingBig = 42;
        boolean nz2z = false;
        while (n > 0) {
            if (pow % 4 == 0)
                pendingBig = big[pow / 4];

            int d = (int) (n % 10);
            n = n / 10;
            if (d != 0) {
                if (pendingBig != null) {
                    out(pendingBig);
                    pendingBig = null;
                }
                out(little[pow % 4]);
                if (!(n == 0 && d == 1 && pow % 4 == 1)) // 一十 開頭的話, 去掉 一
                    out(digits[d]);
                nz2z = true;
            } else {
                if (nz2z)
                    out(digits[d]);
                nz2z = false;
            }
            
            pow++;
        }        
    }