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Searching files without file extension

Posted on 2009-05-19
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Last Modified: 2013-12-17
Hi Guys,

I want to search for all files without file extensions using regular expression.  For examples, I have these files:

file1.xml
file2.dos
file3
file4.pcc
file5


Result is

file3
file5




Thank you in advance
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Question by:xanbi
3 Comments
 
LVL 84

Accepted Solution

by:
ozo earned 125 total points
ID: 24428982
^[^.]*$
0
 
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by:see4me2002
see4me2002 earned 125 total points
ID: 24460390
Hope this helps. below gives the extension separately
***********************

import java.util.regex.*;

public class Main {
    public static void main(String[] args) {
        /*
        Regex: (?<=\\.).*$
        1.)     (?<=\\.)    means       lookbehind excluding "." and add
        2.)     .*          means       every character until
        3.)     $           meabs       end of string
        */
       
        String
                regex = "(?<=\\.).*$",
                input = "C:\\dir\\filename.txt";
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(input);
        String output = "no match";
        if (matcher.find()){
            output = matcher.group();
        }
        System.out.println("\t Output: " + output);
    }
}

******************

Output : txt

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