Java的“％n”是什么？在printf？ [英] What's up with Java's "%n" in printf?
问题描述
我正在阅读Effective Java，它使用％n 来处理换行符。我已经使用 \ n 而非成功地在Java程序中使用换行符。
I'm reading Effective Java and it uses %n for the newline character everywhere. I have used \n rather successfully for newline in Java programs.
哪个'正确'？ \ n 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 \n ? Why did Java change this C convention?
推荐答案
从快速谷歌：
还有一个与参数不对应的说明符。输出换行符的是％n。在某些情况下也可以使用\ n，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\ n则不是。
There is also one specifier that doesn't correspond to an argument. It is "%n" which outputs a line break. A "\n" can also be used in some cases, but since "%n" always outputs the correct platform-specific line separator, it is portable across platforms whereas"\n" is not.
请参阅
https://docs.oracle.com/javase/tutorial/java/data/numberformat.html
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