java如何在字符串数组中定义特殊字符 [英] How to define special characters in string array java

问题描述

我需要定义一个包含以下所有特殊字符的数组..

I need to define an array containing below all special characters..

+ - && || ! ( ) { } [ ] ^ " ~ * ? : \

我正在使用这个

List<String> specialCharactersInSolr = Arrays.asList(new String[] {
                "+", "-", "&&", "||", "!", "(", ")", "{", "}", "[", "]", "^",
                "~", "*", "?", ":", });

它接受除 " 和 \

请帮助如何定义这两个.

Please help how to define these two as well.

推荐答案

\ 和 " 是 String 类中的特殊字符

\ and " are special characters in String class

• " 是字符串的开始或结束
• \ 用于创建一些字符，如新行 \n \r tab\t 或转义特殊字符，例如您的情况 \ 和 "

• " is start or end of String
• \ is used to create some characters like new lines \n \r tab\t or to escape special characters like in your case \ and "

所以要使它们成为文字，您必须使用 "\\" 和 "\""

So to make them literals you will have to escape them with "\\" and "\""

其他想法是使用 Character[] 而不是 String[] 这样你就不必转义 " 并且你的字符可以被写入作为 '"' 或 '\\' (因为 ' 需要转义 - 它应该写成 '\''code> - \ 在这里也很特殊，也需要转义以生成其文字).

Other idea is to use Character[] instead of String[] so you wont have to escape " and yours characters can be written as '"' or '\\' (because ' require escaping - it should be written as '\'' - \ is also special here and will also require escaping to produce its literal).

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