Question

这是我的代码。我希望在每个值旁边打印美元符号。

  for(int i = 0; i < enrollment.size(); i++)
    {
        System.out.println(enrollment.get(i).toString());
        System.out.printf("\tTuition: %17.2f \n",enrollment.get(i).calcTuition());
    }

Answer 1

只需将$嵌入格式字符串中：

System.out.printf("\tTuition: $%17.2f \n",enrollment.get(i).calcTuition());

Answer 2

一种方法是使用NumberFormat货币实例

NumberFormat currencyIntance = NumberFormat.getCurrencyInstance();

double tuition = enrollment.get(i). calcTuition();
System.out.printf("%8s: %9s%n", "Tuition", currencyInstance.format(tuition));

注意，请考虑避免在printf中使用\t和\n。使用\t和%n的格式说明符宽度代替\n。

Answer 3

试试这个：

for (int i = 0; i < enrollment.size(); i++) {
    System.out.println(enrollment.get(i).toString());
    System.out.printf("\tTuition: %s \n", String.format("%17.2f", 
                       enrollment.get(i).calcTuition()).trim());
}

如何在printf方法中将数字值旁边的美元符号显示出来？

3 个答案: