java.lang.Object
  |
  +--java.lang.Throwable
        |
        +--java.lang.Exception
              |
              +--java.lang.RuntimeException
                    |
                    +--java.lang.IllegalArgumentException
                          |
                          +--java.lang.NumberFormatException

public static int parseInt(String s)
                    throws NumberFormatException

package student;

public class StudentFormatException extends IllegalArgumentException
{

    public StudentFormatException(String s)
    {
        super("Data received:\n" + s + "\nFormat expected:\n" + "[number:integer] [name:String] [grade:integer]");
    }
}

	/**
	 * Creates a Vector object from an input stream
	 * The data of each student is stored in one line in the input stream,
	 * and each field is separated by a the delimiter specified in the parameter
	 * DELIM, for example.
	 * 
	 *    328_Galileo Galilei_80_
	 *    123_Albert Einstein_100_
	 *    926_Isaac Newton_90_
	 * 
	 * This method uses {@link StringTokenizer} to obtain each field from a line  
	 *
	 * @param br  a {@link Reader} from which Student
	 *            data are read
	 * @param DELIM  a String with the delimiter used in the stream
	 *               referenced by br 
	 * @return a Vector with the Student data stored
	 *         in the stream br
	 * @throws {@link IOException} if cannot read from the input stream
	 * @throws {@link StudentFormatException} if receives a badly formed data
	 */
	public static Vector makeVectorFromReader(Reader  r, final String  DELIM)
			throws IOException, StudentFormatException {
		
		BufferedReader br = new  BufferedReader(r);
		Vector  v = new  Vector();
		
		StringTokenizer  st;
		String  line = "";
		
		int  number;
		String  name;
		int  grade;
		
		try {		
			line = br.readLine();
			while (line != null)  {
				st = new  StringTokenizer(line, DELIM);
				number = Integer.parseInt(st.nextToken());
				name = st.nextToken();
				grade = Integer.parseInt(st.nextToken());

				if (st.hasMoreTokens())  {
						throw  new  StudentFormatException(line);
				}

				v.add(new  Student(number, name, grade));
				line = br.readLine();
			}
		} catch (NoSuchElementException  nsee)  {
			throw  new  StudentFormatException(line);
		} catch (NumberFormatException  nfe)  {
			throw  new  StudentFormatException(line);
		}
		
		return v;
	}