for some reason my split() works in one line of my code but not the other line

Question

this line of code is messing with me,

String[] parseEmailDomain = parseEmail[1].split(".");

When i do System.out.println(parseEmailDomain.length) the size of the array ends up being 0 BUT the output of System.out.println(parseEmail[1]) is

cs.uh.edu

anyone have any idea as to why when I try to split the array, it doesn't split it but when I try to just output the array it outputs perfectly fine?

I am able to do this

String[] parseEmail = parseLn[i].split("@");

the out put of System.out.println(parseEmail[0]); is hanak and parseLn is an entire line from a text file

Read the javadoc of `split`. – Sotirios Delimanolis Mar 01 '14 at 22:59 — Sotirios Delimanolis, Mar 01 '14 at 22:59
split returns an array that would not you probably expect. – Roman C Mar 01 '14 at 23:07 — Roman C, Mar 01 '14 at 23:07

score 9 · Accepted Answer · edited May 23 '17 at 12:28

9

because . will match anything because split takes a regex!

you will need to escape the dot with \:

 String[] parseEmailDomain = parseEmail[1].split("\\.");

See also the related answer here: Java RegEx meta character (.) and ordinary dot?

edited May 23 '17 at 12:28

Community

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answered Mar 01 '14 at 23:03

donfuxx

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Excellent! You may consider to accept the question then ;-) – donfuxx Mar 01 '14 at 23:41

score 2 · Answer 2 · edited Mar 01 '14 at 23:26

2

Try to put two backslash's before the dot:

String[] parseEmailDomain = parseEmail[1].split("\\.");

A dot in regexes means any character.

edited Mar 01 '14 at 23:26

hichris123

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answered Mar 01 '14 at 23:06

Ivo Fernandes

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score 1 · Answer 3 · answered Mar 01 '14 at 23:01

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parameter of 'split(String)' is actually regular expression so use Scanner or StringTokenizer instead

answered Mar 01 '14 at 23:01

Bitman

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for some reason my split() works in one line of my code but not the other line

3 Answers3

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