Java “替换”（“n”和“replace”）不起作用

这段代码似乎工作得很好

String in = "dr. goldberg offers everything i look for in a general practitioner.  he's nice and easy to talk to without being patronizing; he's always on time in seeing his patients; he's affiliated with a top-notch hospital (nyu) which my parents have explained to me is very important in case something happens and you need surgery; and you can get referrals to see specialists without having to see him first.  really, what more do you need?  i'm sitting here trying to think of any complaint\n\ns i have about him, but i'm really drawing\n a blank.";

但是这个

in = in.replaceAll("\n", "");

似乎不起作用。这不是删除新行常量，请有人解释一下原因

---

（我正在使用substringBetween从文件中获取部分文本）

查看以下代码：

for(String temp: review){
    String reviews = (StringUtils.substringBetween(temp,"\"text\": \"", "\", \"type\"")).replaceAll("\n", "");

    if(reviews.equals(in)){
        System.out.println("yes");
        System.exit(1);
    }
}

或者，您可以使用系统属性删除新行字符，如下所示：

String sample="This string has new line \\n " + "New line is here if \\n \n is working";
    System.out.println("Original String: " + sample); //replacing \n or newline character so that all text come in one line 
    System.out.println("Escaped String: " + sample.replaceAll("\n", ""));

---

StringUtils.substringBetween（temp，“\”text\”：\”，“\”，“\”type\”）

evalutes在运行时执行什么操作？@JigarJoshi-它的计算结果与输入结果相同，但使用新行常量，替换似乎不起作用。另外，我正在使用input.equals（reviews）检查这两个字符串是否相等，它的计算结果应该为true，但它不是。还要注意，您使用的是

replace（）

而不是

replaceAll（）

，因此它不会替换除first@RuslanOstafiychuk-我试过了，但还是不起作用。

String text = readFileAsString("words.txt"); 
text = text.replace(System.getProperty("line.separator"), "");