JFileChooser and directories

Question

I want to be able to open all the files in a directory and if there are any directories inside that, to open all the files in it, and so on and so on. The way I was thinking while opening the files, check if the current File is a file or directory and if it is a directory to recursively open the other files. Is this the best way to do it? If so, how do I check if the current File is a file or directory. If not, what do you suggest?

Answer 1

Here's one I prepared earlier...
   * returns the canonical name of the first ocurrence of seekFilename in or
   * under the given directory, using a recursive depth first file algorithm.
  public static String findFirst(File directory, String seekFilename) throws IOException {
    //tracer.debug("> "+directory);
    File[] files = directory.listFiles();
    if(files==null) return(null);
    for ( int i=0; i<files.length; i++ ) {
      if ( files.isFile() && files[i].getCanonicalPath().endsWith(seekFilename) ) {
//tracer.debug("< "+directory+" -> "+files[i].getCanonicalPath());
return(files[i].getCanonicalPath());
for ( int i=0; i<files.length; i++ ) {
if ( files[i].isDirectory() ) {
String classFilename = findFirst(files[i], seekFilename);
if(classFilename!=null) {
//tracer.debug("< "+directory+" -> "+classFilename);
return(classFilename);
//tracer.debug("< "+directory+" -> null");
return(null);