使用System.out.printf排列小数点

Question

我正在尝试排列输出，以便我的小数点正确排列。我非常接近实现这一点，但数百个地方没有正确排列。任何帮助将不胜感激。

After day 1 you have $         0.02
After day 2 you have $         0.04
After day 3 you have $         0.08
After day 4 you have $         0.16
After day 5 you have $         0.32
After day 6 you have $         0.64
After day 7 you have $         1.28
After day 8 you have $         2.56
After day 9 you have $         5.12
After day 10 you have $        10.24
After day 11 you have $        20.48
After day 12 you have $        40.96
After day 13 you have $        81.92
After day 14 you have $       163.84
After day 15 you have $       327.68
After day 16 you have $       655.36
After day 17 you have $     1,310.72
After day 18 you have $     2,621.44
After day 19 you have $     5,242.88
After day 20 you have $    10,485.76
After day 21 you have $    20,971.52
After day 22 you have $    41,943.04
After day 23 you have $    83,886.08
After day 24 you have $   167,772.16
After day 25 you have $   335,544.32
After day 26 you have $   671,088.64
After day 27 you have $ 1,342,177.28
After day 28 you have $ 2,684,354.56
After day 29 you have $ 5,368,709.12
After day 30 you have $10,737,418.24

我的代码是System.out.printf（“天％d后你有$％，13.2f \ n”，天，钱）;

Answer 1

试试这个：

System.out.printf("After day %2d you have $%,13.2f\n", day, money);

％2d将右对齐数字，并将占用2个字符空间。