import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "( *(((([a-zA-Z]+)|([.#](\\w|\\w+-+\\w*)+)|(:(\\w+(-\\w+)+)(\\([a-zA-Z0-9]+\\))?)|(:{2}(\\w+(-\\w+)+))|(\\*))(\\[ *\\w+ *(([\\^$|~*]?= *)?((\\w|\\w+-+\\w*)+|((\\\\') *.+ *(\\\\'))|((\\\\\") *.+ *(\\\\\"))|((') *.+ *('))|((\") *.+ *(\"))))?( *\\]))*)|(\\[ *\\w+ *(([\\^$|~*]?= *)?((\\w|\\w+-+\\w*)+|((\\\\') *.+ *(\\\\'))|((\\\\\") *.+ *(\\\\\"))|((') *.+ *('))|((\") *.+ *(\"))))?( *\\]))+)((([a-zA-Z]+)|([.#](\\w|\\w+-+\\w*)+)|(:(\\w+(-\\w+)+)(\\([a-zA-Z0-9]+\\))?)|(:{2}(\\w+(-\\w+)+))|(\\*))*(( +|( *[,~>+] *))(((([a-zA-Z]+)|([.#](\\w|\\w+-+\\w*)+)|(:(\\w+(-\\w+)+)(\\([a-zA-Z0-9]+\\))?)|(:{2}(\\w+(-\\w+)+))|(\\*))(\\[ *\\w+ *(([\\^$|~*]?= *)?((\\w|\\w+-+\\w*)+|((\\\\') *.+ *(\\\\'))|((\\\\\") *.+ *(\\\\\"))|(' *.+ *')|((\") *.+ *(\"))))?( *\\]))*)|(\\[ *\\w+ *(([\\^$|~*]?= *)?((\\w|\\w+-+\\w*)+|((\\\\') *.+ *(\\\\'))|((\\\\\") *.+ *(\\\\\"))|((') *.+ *('))|((\") *.+ *(\"))))?( *\\]))+))*)* *(?!.))";
final String string = ":pseudo-class(value)[attribute~=value]#id.class > ::pseudo-element, element";
final String subst = "";
final Pattern pattern = Pattern.compile(regex);
final Matcher matcher = pattern.matcher(string);
// The substituted value will be contained in the result variable
final String result = matcher.replaceAll(subst);
System.out.println("Substitution result: " + result);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html