Class java.util.Collections

Added Methods
(NavigableMap<K, V>) checkedNavigableMap(NavigableMap<K, V>, Class<K>, Class<V>)  
NavigableSet<E> checkedNavigableSet(NavigableSet<E>, Class<E>)  
Queue<E> checkedQueue(Queue<E>, Class<E>)  
(NavigableMap<K, V>) emptyNavigableMap()  
NavigableSet<E> emptyNavigableSet()  
(SortedMap<K, V>) emptySortedMap()  
SortedSet<E> emptySortedSet()  
(NavigableMap<K, V>) synchronizedNavigableMap(NavigableMap<K, V>)  
NavigableSet<T> synchronizedNavigableSet(NavigableSet<T>)  
(NavigableMap<K, V>) unmodifiableNavigableMap(NavigableMap<K, ?, extends, V>)  
NavigableSet<T> unmodifiableNavigableSet(NavigableSet<T>)  
 

Changed Methods
Set<T> singleton(T) Change in return type from Set<E> to Set<T>.
Change in signature from E to T.
  
List<T> singletonList(T) Change in return type from List<E> to List<T>.
Change in signature from E to T.