LinkedHashMap.Entry<K,V> last = tail; tail = p; if (last == null) head = p; else { p.before = last; last.after = p; } } linkedHashSet.iterator() 1 2 3 4 5 6 7 8 9 10 11 Set<String> linkedHashSet = new LinkedHash
Finding First Element using iterator() Method In this approach, we will use the iterator() method and find the first element in LinkedHashSet. Create a LinkedHashSet instance and add elements to the set using the add() method. Create an iterator instance and retrieve the first element using...
void addLast(E e) Adds an element as the last element of this collection (optional operation). E getFirst() Gets the first element of this collection. E getLast() Gets the last element of this collection. static <T> LinkedHashSet<T> newLinkedHashSet(int numElements) Creates a new, em...
TreeSet is implemented using a tree structure(red-black tree in algorithm book). The elements in a set are sorted, but the add, remove, and contains methods has time complexity of O(log (n)). It offers several methods to deal with the ordered set like first(), last(), headSet(), ...
Once obtained, iterator's Next() function moves the iterator to the next element and returns true if there was a next element. If there was an element, then element's can be obtained by iterator's Value() function. Depending on the ordering type, it's position can be obtained by ...
Typically an iterator is obtained by Iterator() function of an ordered container. Once obtained, iterator's Next() function moves the iterator to the next element and returns true if there was a next element. If there was an element, then element's can be obtained by iterator's Value() ...
Gets the first element of this collection. E getLast() Gets the last element of this collection. static <T> LinkedHashSet<T> newLinkedHashSet(int numElements) Creates a new, empty LinkedHashSet suitable for the expected number of elements. E removeFirst() Removes and returns the first elem...
Typically an iterator is obtained by Iterator() function of an ordered container. Once obtained, iterator's Next() function moves the iterator to the next element and returns true if there was a next element. If there was an element, then element's can be obtained by iterator's Value() ...
Typically an iterator is obtained by Iterator() function of an ordered container. Once obtained, iterator's Next() function moves the iterator to the next element and returns true if there was a next element. If there was an element, then element's can be obtained by iterator's Value() ...
Some containers even provide reversible iterators, essentially the same, but provide another extra Prev() function that moves the iterator to the previous element and returns true if there was a previous element. Note: it is unsafe to remove elements from container while iterating. IteratorWith...