Question

I have a String containing a URL. I want to get just one piece of data out of it: an int that should be showing up in the query string.

So if the url is:

http://domain.tld/page.html?iVar=123

I want to get “123” into an int.

What’s the most elegant way you know to do this?

Answer 1

You could try matching just that parameter in the URL string:

public static Integer getIVarParamValue(String urlStr) {
  Pattern p = Pattern.compile("iVar=(\\d+)");
  Matcher m = p.matcher(urlStr);
  if (m.find()) {
    return Integer.parseInt(m.group(1));
  }
  return null;
}