Question

How can I read the first substring that matches my pattern?
I have tried with

while (m.find()) {
              URL=(m.group(1));

            }

With 1 in the group call the app crashes, and if I put nothing in it I get only the last match, I have to read the first matched string, how can I do?
It give me an error about regex, but it’s strange because without the 1 in between the () the app works good and don’t give me any error about my regex…

Answer 1

How does it crash? What is the regex? group(0) is the whole match and group(i), i >0 will give you the captures in the regex if any. Also while(m.find()) processes the string until any matches left. So call find() only once if you need the first match.