Splitting a string into a string array, then splitting again

Asked Dec 09 '15 at 13:49

Active Dec 09 '15 at 13:51

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Hey there wonderful people. I am an active Java student for months now, but still sometimes I come across stuff I am yet to understand. Here the goal was to split an email address into three parts: the address, the domain and the country code at the end.

I came up with the code below, but it throws an "ArrayIndexOutOfBoundsException" error. I understand this is an issue with the second array, but I don't understand the cause, nor I have another idea for this problem.

I would greatly appreciate your help and insight.

    String lineOne = "example@gmail.com";
    String[] arrayOne = line.split("@");

    String lineTwo = arrayOne[1];
    String[] arrayTwo = lineTwo.split(".");

    System.out.println(arrayTwo[0]);
    System.out.println(arrayTwo[1]);

edited Dec 09 '15 at 13:51

Dave Newton

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asked Dec 09 '15 at 13:49

check the contents of lineTwo before trying to split, and the contents of arrayTwo before trying to get its elements – Stultuske Dec 09 '15 at 13:52
The argument to `split` is a regex. `.` in a regex matches every character. So you're not getting back what you think you are. – Dave Newton Dec 09 '15 at 13:53
My favorite: `split(Pattern.quote("."))` – Maroun Dec 09 '15 at 13:53
Yuck compared to just escaping the period; when the pattern is trivial, why bother? – Dave Newton Dec 09 '15 at 13:55
Thank you for your fast inputs. Indeed I forgot about that the dot is regex. – Dec 09 '15 at 13:57

Splitting a string into a string array, then splitting again

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