java正则表达式解析错误

Question

i would like to use this regex in java

^class QuineHash.*?{(.*?(\s))*}$

However when i launch the function it throws an illegal repetion error.

These are the commands:

String pattern = "^class QuineHash.*?{(.*?(\\s))*}$";
Pattern r = Pattern.compile(pattern); 

This is the error:

Exception in thread "main" java.util.regex.PatternSyntaxException: Illegal repetition near index 18
^class QuineHash.*?{(.*?(\s))*}$

How can i solve the problem?

EDIT:

I solve the problem simply by changing the previous regex with this one:

class QuineHash(?:.*?\\s)*}

Answer 1

String pattern = "^class QuineHash.*?\{(.*?(\\s))*\}$";

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