java.util

类 AbstractCollection AbstractList AbstractMap AbstractSequentialList AbstractSet ArrayList Arrays BitSet Calendar Collection Collections Comparator ConcurrentModificationException Date Dictionary EmptyStackException Enumeration EventListener EventObject GregorianCalendar HashMap HashSet Hashtable Iterator LinkedList List ListIterator ListResourceBundle Locale Map MissingResourceException NoSuchElementException Observable Observer Properties PropertyPermission PropertyResourceBundle Random ResourceBundle Set SimpleTimeZone SortedMap SortedSet Stack StringTokenizer TimeZone TooManyListenersException TreeMap TreeSet Vector WeakHashMap