Pattern Based file listing of a directory in java

Hi

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

eg:
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
maruthi.ch