替换（“\n”，“”）不起作用[重复]答案

【问题标题】：replace("\n", "") is not working [duplicate]替换（“\n”，“”）不起作用[重复]
【发布时间】：2014-12-02 22:04:07
【问题描述】：

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.";

这段代码似乎运行良好。

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

但是这个

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

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

似乎不起作用。它没有删除新行常量，有人可以解释为什么！

（我正在使用 substringBetween 从文件中获取部分文本）

【问题讨论】：

StringUtils.substringBetween(temp,"\"text\": \"", "\", \"type\"")) 在运行时评估什么？
@JigarJoshi - 它评估为与 input2 相同的字符串，但使用新行常量，替换似乎不起作用
我也在检查这两个字符串的相等性，使用 input.equals(reviews)，它应该评估为 true，但事实并非如此。
另请注意，您使用的是replace() 而不是replaceAll()，因此它不会替换所有但首先
@RuslanOstafiychuk - 我试过了，但还是不行。

标签： java string replace

【解决方案1】：

看看下面的代码：

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", ""));

或者，您可以使用系统属性来删除换行符，如下所示：

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

【讨论】：