Java中printf的双％格式化问题 [英] Double % formatting question for printf in Java

问题描述

％s 是 printf 中的字符串，％d是我认为的小数......但是放入

%s is a string in printf, and %d is a decimal I thought...yet when putting in

writer.printf("%d dollars is the balance of %s\r\n", bal, nm);

..抛出异常告诉我％d ！= lang.double。想法？

..an exception is thrown telling me that %d != lang.double. Ideas?

推荐答案

％d 适用于整数使用％f 相反，它适用于 float 和 double 类型：

%d is for integers use %f instead, it works for both float and double types:

double d = 1.2;
float f = 1.2f;
System.out.printf("%f %f",d,f); // prints 1.200000 1.200000

这篇关于Java中printf的双％格式化问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！