What’s the difference between ArrayList and LinkedList in Java?
Quality Thought is a leading Full Stack Java Institute in Hyderabad, offering comprehensive training and a live internship program designed to equip students with the practical skills needed to excel in the software development industry. Our expert instructors provide hands-on training in both front-end and back-end technologies, ensuring that participants gain a well-rounded understanding of the Full Stack Java ecosystem.
Our live internship program allows students to work on real-world projects, giving them valuable industry experience and the opportunity to apply what they've learned in a professional setting. This unique learning model bridges the gap between theoretical knowledge and practical application, helping students build a strong portfolio to showcase to potential employers.
As a top-rated Full Stack Java Institute in Hyderabad, Quality Thought focuses on providing personalized training sessions, ensuring that every student receives the attention and support needed to succeed. Our course covers core Java, Spring Boot, Angular, React, database management, and more.
In Java, both Array List and LinkedList are implementations of the List interface, but they differ significantly in how they store and manage data.
Array List uses a dynamic array to store elements. It provides fast random access to elements (i.e., get(index) is O(1)) because it uses an array under the hood. However, adding or removing elements in the middle of an Array List can be slow (O(n)) because it requires shifting elements to maintain order.
LinkedList, on the other hand, uses a doubly linked list structure. Each element (node) stores a reference to the previous and next node. This allows fast insertion and deletion (O(1)) at the beginning or middle of the list, since no shifting is needed. However, accessing elements by index is slower (O(n)) because it has to traverse the list from the start or end.
Key Differences:
-
Access time: Array List is faster for random access; LinkedList is slower.
-
Insertion/Deletion: LinkedList is faster when adding/removing elements in the middle; Array List is slower due to shifting.
-
Memory usage: LinkedList uses more memory due to storing extra pointers for each node.
-
Use case: Use Array List when access speed is important; use LinkedList when frequent insertions/removals are needed.
Each has its strengths, and the choice depends on the specific needs of your application.
Read More
What are the main features of Object-Oriented Programming in Java?
Visit QUALITY THOUGHT Training institute in Hyderabad
Comments
Post a Comment