// while there's another token to read
while in.hasNext()
   // if it's a number
   if in.hasNextInt()
      read it as a number
   else
      // ignore it
      in.next()

|--------------+-----------------|
| nextInt()    | hasNextInt()    |
| nextDouble() | hasNextDouble() |
| next()       | hasNext()       |
|--------------+-----------------|