java 使用replaceAll 将\n替换为 \\n
时间: 2023-09-18 11:12:42 浏览: 93
replaceall.java
在Java中使用replaceAll方法将"\n"替换为"\\n"时,需要使用双反斜杠来表示转义字符。具体操作如下:
1. 创建一个字符串变量,用于存储需要替换的字符串。
2. 使用replaceAll方法,并传入"\n"作为第一个参数,"\\\\n"作为第二个参数。双反斜杠表示转义字符本身的转义,所以要使用四个反斜杠来表示两个反斜杠。
3. 将替换后的字符串赋值给原始字符串变量。
以下是一个示例代码:
```java
String str = "This is a\nnew line.";
str = str.replaceAll("\n", "\\\\n");
System.out.println(str);
```
输出结果为:"This is a\\nnew line.",即将"\n"替换为"\\n"后的字符串。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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