Java regex for word with dot

Question

I need to a regex to validate a string like "foo.com" . A word which contains a dot. I have tried several but could not get it work.

The patterns I have tried:

1. (\\\\w+\\\\.)
2. (\\\\w+.)
3. (\\\\w.)
4. (\\\\W+\\\\.)

Can some one please help me one this.

Thanks,

Answer 1

Use regex with character class

([\\w.]+)

If you just want to contain single . then use

(\\w+\\.\\w+)

In case you want multiple . which is not adjacent then use

(\\w+(?:\\.\\w+)+)

Answer 2

I understand your question like, you need a regex to match a word which has a single dot in-between the word (not first or last).

Then below regex will satisfy your need.

^\\w+\\.\\w+$

Answer 3

This regex works:
[\\w\\[.\\]\\\\]+

Tested for following combinations:
foo.com
foo.co.in
foo...
..foo

Answer 4

To validate a string that contains exactly one dot and at least two letters around use match for

\w+\.\w+

which in Java is denoted as

\\w+\\.\\w+