Pattern Based file listing of a directory in java

Posted on 2003-02-20
Medium Priority
Last Modified: 2010-03-31

I want to list files in a directory based on a pattern.
The FilenameFilter Interface is used for that.

import java.io.FilenameFilter;
import java.io.File;

class JavaSrcFilter implements FilenameFilter {
    public boolean accept(File dir, String name) {
        return (name.endsWith("*.java"));

class Main {
    public static void main (String[] args) {
        String dir = ".";
        if (args.length == 1)
            dir = args[0];

        File f1 = new File(dir);
        int i;
        String[] ls;
        FilenameFilter filter = new JavaSrcFilter();
        System.out.println("Java Source Files: " );
        for (ls = f1.list(filter), i = 0;
             ls != null && i < ls.length;
             System.out.println("\t" + ls[i++]));

But the above just checks for some particular condition like files ending with .java
Any help is greatful in making it generalised such that it works for patterns like
a. *.*
b. *a?b.*
c.  [abc]?*

i.e accepting all types of possible patterns

thanking you in advance

Question by:maruthi123
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Expert Comment

ID: 7986468
if you use java 1.4, that accept method could be like this:
return (name.matches("reg exp"));
LVL 86

Accepted Solution

CEHJ earned 40 total points
ID: 7987382
If you're going to use regular expressions, be careful, as they are not the same as wildcards.

Expert Comment

ID: 9059216
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