public class PDConsoleApplication {
  public static void main(String args[]) {
    // Check to see that there is a command line argument.
   /* if (args.length == 0) {
      System.err.println("You must provide the name of the file"
                         + " that contains the phone directory.");
      System.exit(1);
    }*/
    // Create a PhoneDirectory object.
    PhoneDirectory phoneDirectory = new ArrayBasedPD();
    // Load the phone directory from the file.
    phoneDirectory.loadData("dataFile.txt");
    // Create a PDUserInterface object.
    PDUserInterface phoneDirectoryInterface = new PDConsoleUI();
    // Process user commands.
    phoneDirectoryInterface.processCommands(phoneDirectory);
  }
}