\n JAVA 中有多少个字符？
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how many characters in \n JAVA?
提问by kitokid
just a quick question.
只是一个简单的问题。
I wonder how many characters count for \n(new line ) in JAVA?
我想知道JAVA 中\n（新行）有多少个字符？
Because I need to fit 160 chars in one String,etc.
因为我需要在一个字符串中放入 160 个字符，等等。
So.. How many chars should I consider for \n when appending to my StringBuffer?
那么.. 附加到我的 StringBuffer 时，我应该为 \n 考虑多少个字符？
Thanks
谢谢
回答by Ignacio Vazquez-Abrams
'\n'itself is one character when represented internally in Java, but when interfacing with external systems it can be represented by anywhere between 1 and 8 bytes. Some systems and protocols represent a newline with \r\n, which is 2 characters. And the encoding matters as well, since it can cause each character to use 1, 2, or 4 bytes.
'\n'在 Java 内部表示时，它本身是一个字符，但在与外部系统接口时，它可以用 1 到 8 个字节之间的任何位置表示。一些系统和协议用 表示一个换行符\r\n，它是 2 个字符。编码也很重要，因为它可能导致每个字符使用 1、2 或 4 个字节。
Without more information on what system or protocol the characters are going to be sent on it is not possible to give a completely accurate answer.
如果没有更多关于字符将在什么系统或协议上发送的信息，就不可能给出完全准确的答案。
回答by Vik Gamov
1 character.
1 个字符。
String str = "qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq\n";
System.out.println(str.length());
output 160
输出 160
回答by Petar Ivanov
'\n' is just a single character.
'\n' 只是一个字符。
回答by AjayR
\n should be single character only.
\n 只能是单个字符。
回答by Peter Lawrey
The property System.getProperty("line.separator")is a system dependant new-line String. This can be one or two characters. \nis the line feed (single) character which could happen to be the same as a new line, but this is platform dependant.
该属性System.getProperty("line.separator")是一个系统相关的换行字符串。这可以是一两个字符。\n是换行（单个）字符，它可能与换行符相同，但这取决于平台。
回答by ameyume
‘\n', '\r', '\t', '\0' they are all one character in both java and c/c++, and other languages.
'\n', '\r', '\t', '\0' 它们在 java 和 c/c++ 以及其他语言中都是一个字符。
回答by M.J.
\nin java corresponds to only one character. If you need to check then might this code will help.
\n在java中只对应一个字符。如果您需要检查，那么此代码可能会有所帮助。
String str = "\n";
char[] test = str.toCharArray();
System.out.println(test.length);
