public static void main( String[] args )
      throws IOException
  {
    BufferedReader userIn =
        new BufferedReader(
        new InputStreamReader( System.in ) );
 
    String line;
    int    startMiles, endMiles;
    double gallons;
 
    System.out.println("Enter first reading:" );
    line = userIn.readLine();
    startMiles = Integer.parseInt( line );
 
    System.out.println("Enter second reading:" );
    line = userIn.readLine();
    endMiles = Integer.parseInt( line );
 
    System.out.println("Enter gallons:" );
    line = userIn.readLine();