import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "(?:\\b(\\p{Lu}\\w*(?:\\s+\\p{Lu}\\w*)*))?\\s*\\(([^()]*\\d{4})\\)";
final String string = "This is a test. I only want to select the (cites) in parenthesis. I do not want it to return words in parenthesis that do not have years attached, such as abbreviations (abbr). For example, citing (Smith 2010) is something I would want to be returned. I would also want multiple citations returned separately such as (Smith 2010; Jones 2001; Brown 2020). I would also want Cooper (2015) returned as Cooper 2015, and not just 2015.";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
final Matcher matcher = pattern.matcher(string);
while (matcher.find()) {
System.out.println("Full match: " + matcher.group(0));
for (int i = 1; i <= matcher.groupCount(); i++) {
System.out.println("Group " + i + ": " + matcher.group(i));
}
}
}
}
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