Substring in Java with recurrent substring

Question

I have this string:

file:/C:/workWaveMaker/projects/AAA/webapproot/WEB-INF/classes/custom/

My goal is to parse only the string AAA in this case, but I will face othere similar strings where AAA is not the string, but something different. Is there a way to solve this based for example on the recurrent string webapproot?

Answer 1

Use the Pattern class using regex to extract the AAA

String s = "file:/C:/workWaveMaker/projects/AAA/webapproot/WEB-INF/classes/custom/";
Pattern p = Pattern.compile("/projects/(.*?)/webapproot/");
Matcher m = p.matcher(s);
if (m.find()) 
  System.out.println(m.group(1)); // => result "AAA"