Difference Between Hashset And Linkedhashset In Java
difference between HashSet and LinkedHashSet in Java: A Comparison
Difference Between Hashset And Linkedhashset In Java
In Java, HashSet is a collection that stores unique elements using a hash table for faster access and retrieval of elements. It does not maintain the insertion order of elements. On the other hand, LinkedHashSet is a subclass of HashSet that maintains the insertion order of elements by using a doubly linked list. This means that when you iterate through a LinkedHashSet, the elements will be returned in the order in which they were inserted. Therefore, if you need a fast and efficient way to store unique elements without any specific order requirement, you can use HashSet. However, if you need to maintain the insertion order of elements, then LinkedHashSet would be the better choice.
To Download Our Brochure: https://www.justacademy.co/download-brochure-for-free
Message us for more information: +91 9987184296
1 - HashSet in Java:
HashSet is a collection that does not guarantee the order of elements.
2) LinkedHashSet in Java:
LinkedHashSet is a special type of HashSet which maintains the insertion order of elements.
3) Performance:
HashSet offers better performance in terms of adding, removing, and checking for the presence of elements due to its hashing mechanism.
LinkedHashSet might have slightly slower performance compared to HashSet because it maintains a doubly linked list of entries to preserve order.
4) Null Values:
Both HashSet and LinkedHashSet allow one null element, as they allow null values in general.
5) Iteration Order:
HashSet does not maintain the order of elements when iterating over them.
LinkedHashSet guarantees the order of elements as they were inserted, making it suitable for scenarios where order matters.
6) Memory Usage:
HashSet generally consumes less memory compared to LinkedHashSet as it does not maintain the order of elements explicitly.
7) Use Cases:
If the order of elements is not important and you need good performance, HashSet is a suitable choice.
If the insertion order needs to be preserved and performance is not a critical factor, LinkedHashSet is a better option.
8) Inheritance:
HashSet class extends AbstractSet and implements Set interface.
LinkedHashSet class extends HashSet and maintains a doubly linked list running through all of its entries.
9) Constructors:
HashSet can be instantiated using constructors like HashSet(), HashSet(Collection c), HashSet(int initialCapacity), etc.
LinkedHashSet can be instantiated using constructors like LinkedHashSet(), LinkedHashSet(Collection c), LinkedHashSet(int initialCapacity), etc.
10) Common Methods:
To Download Our Brochure: Click Here
Message us for more information: +91 9987184296
Both HashSet and LinkedHashSet provide common methods for adding elements (add), removing elements (remove), checking existence (contains), clearing the set, and checking size (size), among others.
Browse our course links : https://www.justacademy.co/all-courses
To Join our FREE DEMO Session: Click Here
Contact Us for more info:
- Message us on Whatsapp: +91 9987184296
- Email id: info@justacademy.co
Interview Questions For Java Full Stack Developer
Web Design Classes In Vadodara
Why You Choose Digital Marketing Interview Questions
