Java 的“%n"怎么了?在 printf 中? [英] What's up with Java's "%n" in printf?

问题描述

我正在阅读 Effective Java，它在任何地方都使用 %n 作为换行符.我已经成功地将 用于 Java 程序中的换行符.

I'm reading Effective Java and it uses %n for the newline character everywhere. I have used rather successfully for newline in Java programs.

哪个是正确"的? 有什么问题?为什么 Java 改变了这个 C 约定?

Which is the 'correct' one? What's wrong with ? Why did Java change this C convention?

推荐答案

来自快速谷歌:

还有一个说明符与参数不对应.输出换行符的是%n".在某些情况下也可以使用 " "，但由于 "%n" 始终输出正确的特定于平台的行分隔符，因此它可以跨平台移植，而 " " 不是.

There is also one specifier that doesn't correspond to an argument. It is "%n" which outputs a line break. A " " can also be used in some cases, but since "%n" always outputs the correct platform-specific line separator, it is portable across platforms whereas" " is not.

请参考https://docs.oracle.com/javase/tutorial/java/data/numberformat.html

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