How to "walk around" in the File System with Java [closed]

Question

I'd like to do a search for folders/directories from java, and go into those folders/directories in java. I guess it's called system utilities? Any tutorials out there, or books on the subject?

Thanks ;)

Answer 1

I use this code to get all ZIP files in a folder. Call this recursively checking for the file object to be a sub directory again and again.

public List<String> getFiles(String folder) {

List<String> list = new ArrayList<String>();
        File dir = new File(folder);
        if(dir.isDirectory()) {
            FileFilter filter = new FileFilter() {

                public boolean accept(File file) {
                    boolean flag = false;
                    if(file.isFile() && !file.isDirectory()) {
                        String filename = file.getName();
                        if(!filename.endsWith(".zip")) {
                            return true;
                        }
                        return false;   
                }

            };
            File[] fileNames = dir.listFiles(filter);
            for (File file : fileNames) {
                list.add(file.getName());
            }
            return list;

}

Answer 2

You could use Apache Commons FileUtils (see: http://commons.apache.org/io/api-release/org/apache/commons/io/FileUtils.html) and specifically the listFiles method there, which can do this recursively and use filters (so it saves you the writing of the recursion yourself and answers the search you mentioned).