import java.util.regex.Matcher import java.util.regex.Pattern def html= "<a href=\"#\" onclick=\"showChangeLoadingPoint('1283229','267202','39','BUF-LHX', 'True','', 'False')\">39</a>" Pattern pattern = Pattern.compile(/\(\'\d{5,}\',/) Matcher matcher = pattern.matcher(html) if (matcher.find()) { System.out.println(matcher.group(0)[2..-3]); }