在java中使用printf格式化问题 [英] Formatting problems using printf in java

问题描述

我已经在不同的帖子中阅读了一些有关线格式化问题的人的其他答案，但是还没有找到任何有助于解决问题的内容。我也看过java文档，没有什么我做的似乎工作。

I've read a few other answers on different posts about people having specific problems with line formatting, but have not found anything that has helped enough to solve my problem. I've also looked at the java docs and nothing I have done seems to work.

最后一行代码是我想要格式化的代码。
我最好用3个十进制精度输出格式化。

The last line of code is the one I'm trying to format. I ideally want to format it with 3 decimal precision output.

Double hi = 32.22;
System.out.println("The sqrt. is = " + Math.sqrt(hi));
System.out.printf("The Sqrt Rounded Down Is: " + "/%.3d", Math.floor(Math.sqrt(hi)));

与我/%3d有什么不对，还是别的什么？我不完全理解/记住所有格式选项。

is anything wrong with me "/%.3d", or is it something else? I don't quite fully understand/remember all the formatting options.

推荐答案

尝试这样：

System.out.printf("The Sqrt Rounded Down Is: " + "%.3f", Math.floor(Math.sqrt(hi)));

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