The blog provides the details about the Java Collection Set Interface. The Set Interface in java collection buy Lyrica 75 mg does not support duplicate elements like List Interface. The Set Interface Burhānuddin inherits methods only from Collection Interface and provides comparison for equals and hashcode operation irrespective of having different implementation types
Set Interface Implementation Types
The Java Collection Framework provides 3 types of Set Implementation:
- HashSet: stores elements in a Hash Table and provides high quality implementation
- TreeSet: stores elements in a tree like structure and orders the elements based on values, performs slower than HashSet
- LinkedHashSet: stores elements in a Hash Table with a linked list and orders the elements based on sequential insertion process, performs slower than HashSet
The Set Interface class Hierarchy is given below
public interface Set<E>
extends Collection<E>
The Set Interface provides the below given methods for implementation
| HashSet Methods | HashSet Methods Description |
| add(E e) | add the specified element to the set if not present |
| addAll(Collection <? Extends E>c) | allows to insert all elements in the given collection to the set |
| clear() | removes all elements from the set |
| containsAll(Collection <? Extends E>c) | returns true if all elements in the given collection are present in the set |
| contains(object o) | returns true if specified element presents in the set |
| isEmpty() | returns true if no elements in the set |
| iterator() | returns iterator over the elements in the set |
| remove (object o) | remove the specified element if present in the set |
| removeAll(Collection <? Extends E>c) | removes all elements in the given collection from the set |
| retainAll(Collection <? Extends E>c) | retains all elements in the given collection in the set |
| size() | returns the set size |
| spliterator() | Creates a late-binding and fail-fast Spliterator over the elements in the set |
| hashcode() | returns the hashcode value for set |
| toArray() | returns an array for set elements |
| toArray(T[] a) | returns an array for set elements with return type as array |
