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Syntax error in regex pattern near index 1

Escaping a regex is usually done by \, but in Java \ is represented as \ \. + should be escaped, cause + is used to represent one of the quantifiers. PatternSyntaxException: Syntax error in regexp pattern near index. 【 已解决】 android中的regex出错: java. PatternSyntaxException: Incorrect Unicode property near index 32: 错误. PatternSyntaxException: Syntax error in regexp pattern near index 1:. PatternSyntaxException: Unclosed group near index 1. This exception is thrown when a regex ( a regular exception) pattern is not correct, i. has syntax errors. The PatternSyntaxException. PatternSyntaxException: Unexpected internal error near index 1. 0- beta- 1( compile.

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    Syntax error regex

    PatternSyntaxException: Syntax error in regexp pattern near index 18: ( [ ^ \ \ ] ) \ { ( [ ^ { } ] + ) } ^ at java. PatternSyntaxException: Illegal repetition near index 5 ^ \ \ $ \ \ { ( [ \ \ w] + ) \ \ } $ ^ at java. In regex expression, ' { ', ' [ ' and so on are special character and need to be escaped, so you should use \ { to express {, so your refex expression is. String group( ) returns the previous match' s characters. The index is set to - 1 when the syntax error location isn' t known. itree input = Treehouse Bad regex: Unknown inline modifier near index 3 (? PatternSyntaxException( String desc, String regex, int index). the description of the syntax error and its index, the erroneous regular- expression pattern,. index - The approximate index in the pattern of the error, or - 1 if the index is not known.