For the following operations, we can convert a HashSet to a TreeSet ? Sorted Order: TreeSet maintains elements in ascending order. Range-Based Operations: It supports operations like headSet(), tailSet(), and s
1.源码如下: TreeSet A NavigableSet implementation based on a TreeMap. The elements are ordered using their natural ordering, or by a Comparator provided at set creation time, depending on which constructor is used. This implementation provides guaranteed log(n) time cost for the basic operations...
TreeSet = [100, 90, 80, 70, 60, 50, 40, 30, 20, 10] java.util.Collections$ReverseComparator@7ff95560 Time Complexity: O(n log n ) for inserting n elements (due to balanced tree operations). Space Complexity: O(n) as TreeSet stores n elements. Conclusion Using a TreeSet with ...
Returns a view of the portion of this set whose elements are less than (or equal to, ifinclusiveis true)toElement. The returned set is backed by this set, so changes in the returned set are reflected in this set, and vice-versa. The returned set supports all optional set operations tha...
This implementation provides guaranteed log(n) time cost for the basic operations (add,removeandcontains). Note that the ordering maintained by a set (whether or not an explicit comparator is provided) must beconsistent with equalsif it is to correctly implement theSetinterface. (SeeComparableorCo...
* operations ({@code add}, {@code remove} and {@code contains}). * * Note that the ordering maintained by a set (whether or not an explicit * comparator is provided) must be consistent with equals if it is to * correctly implement...
The returned set is backed by this set, so changes in the returned set are reflected in this set,and vice-versa. The returned set supports all optional set operations that this set supports. The returned set will throw an IllegalArgumentException on an attempt to insert an element outside ...
The stack interface represents a last-in-first-out (LIFO) collection of objects. The usual push and pop operations are provided, as well as a method to peek at the top item on the stack, a method to check whether the stack is empty and the size (number of elements). All stacks imple...
Could youdoboth operations in O(1) time complexity?Example: LFUCache cache=newLFUCache( 2/*capacity*/); cache.set(1, 1); cache.set(2, 2); cache.get(1);//returns 1cache.set(3, 3);//evicts key 2cache.get(2);//returns -1 (not found)cache.get(3);//returns 3.cache.set(4...
Values() // []int{1,5} (in order) set.Clear() // empty set.Empty() // true set.Size() // 0 } Stacks A stack that represents a last-in-first-out (LIFO) data structure. The usual push and pop operations are provided, as well as a method to peek at the top item on the ...