I'm just trying with Processing 2.0b7 a project who worked fine with Processing 1.5 and I'm very surprised to see this error message:

Cannot find a class or type named "File"

This error blocks the following function, making all my works useless... I see no way to turn the class File for deleting text files or for reading directories.

public static void delete(String fileName) {
  //String fileName = sketchPath(f);
  try {
    File target = new File(fileName);
    if (!target.exists()) {System.err.println("File " + fileName + " not present to begin with!");return;}
    if (target.delete()) System.err.println("** Deleted " + fileName + " **");
    else System.err.println("Failed to delete " + fileName);
  } catch (SecurityException e) {
    System.err.println("Unable to delete " + fileName + "(" + e.getMessage() + ")");
  }
}
String[] myDirectory(String dir) {
  File file = new File(sketchPath(dir));
  if (file.isDirectory()) {
    String names[] = file.list();
    return names;
  } else {
    String[]s=new String[0];
    return s;
  }
}


So I try the "examples" for 2.0b7 and found a sketch named "DirectoryList"... but it use the File class and don't work too.

I'm on windows 7, I have no problems with olders versions of Processing except that applications don't work on my computer (but fine in most friend's computers).