The readFile method of the DataSetReader class

• Constructs Scanner object
• Calls readData method
• Completely unconcerned with any exceptions
• If there is a problem with input file, it simply passes the exception to caller

  public double[] readFile(String filename)
        throws IOException, BadDataException
        // FileNotFoundException is an IOException
  {
     FileReader reader = new FileReader(filename);
     try
     {
        Scanner in = new Scanner(reader);
        readData(in);
     }
     finally
     {
        reader.close();
     }
     return data;
  }