如何删除字符串中的括号字符（java）
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how to remove brackets character in string (java)
提问by Muhammad Haryadi Futra
I want to remove all type of brackets character (example: [],(),{}) in string by using java.
我想使用 java 删除字符串中所有类型的括号字符（例如：[],(),{}）。
I tried using this code:
我尝试使用此代码：
String test = "watching tv (at home)";
test = test.replaceAll("(","");
test = test.replaceAll(")","");
But it's not working, help me please.
但它不起作用，请帮助我。
采纳答案by StackFlowed
To remove all punctuation marks that include all brackets, braces and sq. brackets ... as per the question is:
要删除包括所有括号、大括号和方括号的所有标点符号......根据问题是：
String test = "watching tv (at home)";
test = test.replaceAll("\p{P}","");
回答by AbstractChaos
You need to escape the bracket as it will be treated as part of a regex
您需要转义括号，因为它将被视为正则表达式的一部分
String test = "watching tv (at home)";
test = test.replaceAll("\(","");
test = test.replaceAll("\)","");
Also to remove all brackets try
还要删除所有括号尝试
String test = "watching tv (at home)";
test = test.replaceAll("[\(\)\[\]\{\}]","");
回答by Reimeus
The first argument of replaceAlltakes a regular expression.
的第一个参数replaceAll采用正则表达式。
All the brackets have meaning in regex: Brackets are used in regex to reference capturing groups, square brackets are used for character class& braces are used for matched character occurrence. Therefore they all need to be escaped...However here the characters can simply be enclosed in a character classwith just escaping required for square brackets
所有括号在正则表达式中都有意义：括号在正则表达式中用于引用捕获组，方括号用于字符类，大括号用于匹配的字符出现。因此，它们都需要转义……然而，这里的字符可以简单地包含在一个字符类中，只需对方括号进行转义即可
test = test.replaceAll("[\[\](){}]","");
回答by Javi Fernández
You can use String.replaceinstead of String.replaceAllfor better performance, as it searches for the exact sequence and does not need regular expressions.
您可以使用String.replace而不是String.replaceAll为了更好的性能，因为它搜索确切的序列并且不需要正则表达式。
String test = "watching tv (at home)";
test = test.replace("(", " ");
test = test.replace(")", " ");
test = test.replace("[", " ");
test = test.replace("]", " ");
test = test.replace("{", " ");
test = test.replace("}", " ");
If you are working with texts I recommend you to replace the brackets with an empty space to avoid words joining together: watching tv(at home) -> watching tvat home
如果您正在处理文本，我建议您将括号替换为空格以避免单词连接在一起： watching tv(at home) -> watching tvat home
回答by hwnd
The first argument passed to the replaceAll()method should be a regular expression. If you want to match those literal bracket characters you need to escape \\(, \\)them.
传递给该replaceAll()方法的第一个参数应该是一个正则表达式。如果你想匹配那些需要转义的文字括号字符\\(，\\)它们。
You could use the following to remove bracket characters. Unicode property \p{Ps}will match any kind of opening bracket and Unicode property \p{Pe}matches any kind of closing bracket.
您可以使用以下内容删除括号字符。Unicode 属性\p{Ps}将匹配任何类型的左括号，而Unicode 属性将\p{Pe}匹配任何类型的右括号。
String test = "watching tv (at home) or [at school] or {at work}()[]{}";
test = test.replaceAll("[\p{Ps}\p{Pe}]", "");
System.out.println(test); //=> "watching tv at home or at school or at work"
回答by Santhosh Hirekerur
subject =StringUtils.substringBetween(subject, "[", "]")
主题 =StringUtils.substringBetween（主题，“[”，“]”）
