何满潮妻子:什么错？问号的地方

java.util不包含scanner这个类

java.util包中，没有Scanner类。以下是java.util包中所有类的列表：
java.util
Interfaces：
Collection
Comparator
Enumeration
EventListener
Iterator
List
ListIterator
Map
Map.Entry
Observer
RandomAccess
Set
SortedMap
SortedSet

Classes：
AbstractCollection
AbstractList
AbstractMap
AbstractSequentialList
AbstractSet
ArrayList
Arrays
BitSet
Calendar
Collections
Currency
Date
Dictionary
EventListenerProxy
EventObject
GregorianCalendar
HashMap
HashSet
Hashtable
IdentityHashMap
LinkedHashMap
LinkedHashSet
LinkedList
ListResourceBundle
Locale
Observable
Properties
PropertyPermission
PropertyResourceBundle
Random
ResourceBundle
SimpleTimeZone
Stack
StringTokenizer
Timer
TimerTask
TimeZone
TreeMap
TreeSet
Vector
WeakHashMap

Exceptions：
ConcurrentModificationException
EmptyStackException
MissingResourceException
NoSuchElementException
TooManyListenersException