Section 1 Summary

You explored the fundamental data structures in Java and gained an understanding of how they work under the hood. We started with ArrayList, examined its structure, and learned that it is based on an array that dynamically resizes when needed. Then, you got familiar with LinkedList, analyzed its advantages and disadvantages, and discovered why it can sometimes be faster than ArrayList.

You didn't just go through the theory—you also implemented your own singly linked list (SinglyLinkedList) in practice. Along the way, you learned how to:

• Use ArrayList and LinkedList based on the specific needs of a task.
• Understand how lists are structured, their time complexities, and when linked lists are preferable to arrays.
• Build your own data structures, using classes and objects to add, update, and remove elements.

By working on real-world tasks, you reinforced your knowledge and prepared yourself for the next sections, where we'll dive into even more powerful data structures and learn how to work efficiently with collections in Java!