Java 使用正则表达式在索引附近的未封闭组
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Unclosed Group near index using Regex
提问by webminer07
I am trying to test a phone numbers format using regular expressions, regex, and when I run the Pattern.compile I receive the error java.util.regex.PatternSyntaxException: Unclosed group near index 34
我正在尝试使用正则表达式、regex 测试电话号码格式，当我运行 Pattern.compile 时，我收到错误java.util.regex.PatternSyntaxException: Unclosed group near index 34
public String checkPhoneNum(String inPhoneNum)
{
Pattern checkRegex = Pattern.compile("(\([0-9]{3}\)([0-9]{3}(-)[0-9]{4})");
Matcher regexMatcher = checkRegex.matcher(inPhoneNum);
if(regexMatcher.find())
{
return inPhoneNum;
}
else
return null;
}
is the string (\\([0-9]{3}\\)([0-9]{3}(-)[0-9]{4})not correctly written for format (000)111-2222?
(\\([0-9]{3}\\)([0-9]{3}(-)[0-9]{4})是否为格式 (000)111-2222 编写的字符串不正确？
采纳答案by Szymon
You are missing one closing parenthesis in the first matching group:
您在第一个匹配组中缺少一个右括号：
It should be
它应该是
Pattern checkRegex = Pattern.compile("(\([0-9]{3}\))([0-9]{3}(-)[0-9]{4})");
As it is:
原样：
( - start of mathing group
\( - matches (
[0-9]{3} - 3 digits
\) - matches )
) - end of matching group (this is the one you missed)
