import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "^(?:(“(?! “).*?)\\s*”|(“) “(.*)|((?!“).*?)\\s*”)$";
final String string = "“ Criteria 1, ending with RD and beginning with LD, but not LDLD, remove RD ”\n"
+ "“ “ Criteria 1, ending with RD but beginning with LDLD, do nothing to RD ”\n"
+ "“ “ Criteria 2, beginning with LDLD, make it begin with LD ”\n"
+ "Criteria 3 with non-matching RD, remove RD ”";
final String subst = "$1$2$3$4";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
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