Java: Get integer value from URL

Question

Hi I am trying to get a String out of URL.

I am using Regular Expression.

String url = "http://localhost/htc/android/htc-incredible/259164-gpid";
Pattern regex = Pattern.compile("^.+/(\\d+)-gpid$"); 
Matcher tagmatch = regex.matcher( url );
System.out.println(tagmatch.group(0));

Error:

Exception in thread "main" java.lang.IllegalStateException: No match found

What I am doing wrong:

Answer 1

You need to use group(1) (the contents of the first capturing group), not group(0) (the entire match).

Oh, and of course you need to actually do a search:

tagmatch.find();
System.out.println(tagmatch.group(1));

Answer 2

You could try this:

String url = "http://localhost/htc/android/htc-incredible/259164-gpid";
url.substring(url.indexOf('/',url.indexOf("htc-incredible/"))+1,url.indexOf("-gpid"));

Answer 3

Alternatively, you can use lastIndexOf in combination with split to get the part of the url you want. Code will look like this

url.substring(url.lastIndexOf('/')+1).split("-")[0] //prints 259164