Reading a string in java until certain character matched 3rd time

Question

Im reading a file which contains Urls like (http://www.espncricinfo.com/netstorage/817215.json?xhr=1) , How to get the string like (http://www.espncricinfo.com/) before 3rd ('/').

Take a look at this question about getting the [nth index of a character in a string](http://stackoverflow.com/questions/3976616/how-to-find-nth-occurrence-of-character-in-a-string). If you implement that its simple to use in in conjunction with `substring()`. — Ryan Jackman, Aug 04 '15 at 15:09
Thanks nafas it is working . and other comments are also valid for me and i will also trying to solve it using regex. — , Aug 04 '15 at 15:22

nafas · Accepted Answer · 2015-08-04T15:28:40.800

1

One way: make use of RegEx,

    String link = "http://www.espncricinfo.com/netstorage/817215.json?xhr=1";
    Pattern pattern = Pattern.compile("((https?://)[^/]+/?)");
    Matcher matcher = pattern.matcher(link);

    while (matcher.find()) {
        System.out.println(matcher.group(1));
    }

better way: Make use of URL package:

    URL url = new URL(link);
    System.out.println(url.getHost());

edited Aug 04 '15 at 15:28

answered Aug 04 '15 at 15:16

nafas

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I want to try it but answered ,good – Aug 04 '15 at 15:26
@sharief does ur file contain other stuff? – nafas Aug 04 '15 at 15:27
@sharief try it now, it should only pick urls starting with http:// or https:// – nafas Aug 04 '15 at 15:30

score 0 · Answer 2 · answered Aug 04 '15 at 15:16

0

The most easy way seems to be creating the URL object and getting the host name from it

String url = "http://www.espncricinfo.com/netstorage/817215.json?xhr=1";
URL u = new URL(url);
System.out.println(u.getHost());

answered Aug 04 '15 at 15:16

MaxZoom

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score 0 · Answer 3 · answered Aug 04 '15 at 15:17

0

Use java.net.URL:

URL url = new URL("http://www.espncricinfo.com/netstorage/817215.json?xhr=1");
String before_3rd = url.getProtocol() +"://" + url.getHost() + url.getPort();

answered Aug 04 '15 at 15:17

Anton Krosnev

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score 0 · Answer 4 · answered Aug 04 '15 at 15:27

You can use the URI method resolve:

URI uri = URI.create("http://www.espncricinfo.com/netstorage/817215.json?xhr=1&a=b");
String result = uri.resolve("/").toString();

This method basically uses your original URI as the basis to calculating a similar URI with a different path. By giving it the path "/" it means you will get back the original base URI (including user info or port if they were there). Printing the result above will give:

http://www.espncricinfo.com/

And if your original URL was:

http://user:pass@www.espncricinfo.com:8080/netstorage/817215.json?xhr=1

The result would be:

http://user:pass@www.espncricinfo.com:8080/

Reading a string in java until certain character matched 3rd time

4 Answers4