Omar Kooheji Omar Kooheji - 6 months ago 23
Java Question

Listing files in a directory matching a pattern in Java

I'm looking for a way to get a list of files that match a pattern (pref regex) in a given directory.

I've found a tutorial online that uses apache's commons-io package with the following code:

Collection getAllFilesThatMatchFilenameExtension(String directoryName, String extension)
File directory = new File(directoryName);
return FileUtils.listFiles(directory, new WildcardFileFilter(extension), null);

But that just returns a base collection (According to the docs it's a collection of
). Is there a way to do this that returns a type safe generic collection?


See File#listFiles(FilenameFilter).

File dir = new File(".");
File [] files = dir.listFiles(new FilenameFilter() {
    public boolean accept(File dir, String name) {
        return name.endsWith(".xml");

for (File xmlfile : files) {