Extract domain name from given address Java RegEx

Question

I want output "xyz" instead of "www.xyz.com". Mainly I asked this because I wanted to know how to extract something in between the pattern except the pattern itself.

public class Test {
    public static void main(String[] args) {
        Pattern p = Pattern.compile("www[.].+[.]com");
        Matcher m = p.matcher("www.xyz.com");
        if(m.find()){
            System.out.println(m.group());
        }
        in.close();
    }
}

Nice question, too. And in case you reach 15 rep and you want to practice upvoting, I am around and glad to help ;-) — GhostCat, Jul 10 '17 at 07:24

Youcef LAIDANI · Accepted Answer · 2017-06-22T16:35:36.453

0

You ca use \.(.*?)\. which mean any thing between the two dots :

Pattern p = Pattern.compile("www\\.(.*?)\\.com");
Matcher m = p.matcher("I saw a tree. tree was tall. now I will search tree on www.google.com .");
if (m.find()) {
    System.out.println(m.group(1));
}

output

google

edited Jun 22 '17 at 16:35

answered Jun 22 '17 at 15:28

Youcef LAIDANI

55,661
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i don't get you @YashBhutoria ! – Youcef LAIDANI Jun 22 '17 at 15:45
In my case, I have to do this using a paragraph as an input. using this may cause trouble. Suppose this input : "I saw a tree. tree was tall. now I will search tree on www.google.com ." @YCF_L – Yash Bhutoria Jun 22 '17 at 16:04
check my edit @YashBhutoria hope this can help you :) – Youcef LAIDANI Jun 22 '17 at 16:35
what does that group one means ?(does this means second match ?) will this work in larger paragraphs ? – Yash Bhutoria Jun 23 '17 at 16:54
@YashBhutoria it mean that groupe between `www\\.` and `\\.com` yes i can work in large paragraphe like you already use in your example `I saw a tree. tree was tall. now I will search tree on www.google.com .` – Youcef LAIDANI Jun 23 '17 at 16:56

Extract domain name from given address Java RegEx

1 Answers1