import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "operator\\D+(\\d+)";
final String string = "I have following string dfed operator 11 - 145. I am trying to match string operator 11 and inside this matched string, i am trying to match string 11. Currently I successfully matched operator 11 with regex ((O|o)perator(i|I)?\\s*)\\d+(?=\\s*(-|_)\\s*\\d+). As I am in javascript, I can not use lookbehinds.\n\n"
+ "Is my approach correct? Is there any way to accomplish this in regex? How can i match string 11 inside previously matched string operator 11?";
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