ArrayList in Java | 🚀 DSA Tutorial (Working, Time Complexity, Methods)

Published: 09 December 2025
on channel: Smart Programming

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📌 In this video, we will learn ArrayList in Java from scratch with complete clarity.

I have explained everything practically in IntelliJ IDEA, including:
✔ What is ArrayList?
✔ ArrayList vs Array
✔ How ArrayList works internally
✔ Important methods (add, remove, get, set, size, contains, clear, etc.)
✔ Time Complexity of all major operations
✔ Practical coding examples in IntelliJ

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📌 Whether you are preparing for DSA, Java interviews, placement exams, or improving Java fundamentals, this video will help you understand ArrayList completely.

🎯 Who Should Watch This Video?
✔ Java Beginners
✔ DSA Learners
✔ Students preparing for Placements
✔ Anyone who wants to learn Collection Framework
✔ Java Developers improving fundamentals

🔥 Related Topics
✔ Java & DSA Course | ArrayList in Java | Collections, Lists, ArrayList
✔ Methods & Problems | Lecture
✔ ArrayList In Java + Notes | Java Placement Course
✔ ArrayList Explained: Master Java’s Dynamic Arrays in Minutes
✔ Introduction to Arrays and ArrayList in Java
✔ ArrayList in Java: Demo & Methods
✔ Array vs. ArrayList in Java Tutorial – What’s The Difference?
✔ DSA in Java | Arrays | Java in One Shot | Arrays in Java | Java Course
✔ ArrayList & Vector in Java | Collections | Core Java | Java Programming
✔ Session - Collections in Java | ArrayList | HashSet | HashMap
✔ Data Structures and Algorithms (DSA) in Java
✔ ArrayList with Objects in Java
✔ Java ArrayList Explained
✔ ArrayList in Java by Deepak | Collection Framework in Java

⏱️ Timestamps / Video Chapters:
00:00 - Introduction
00:45 - What is Array & ArrayList
09:29 - How ArrayList Works
14:28 - ArrayList Capacity & Size
15:28 - Time Complexity of ArrayList Operations
20:29 - ArrayList Methods Practical Programs
29:13 - Java & DSA Notes

#arraylist #dsatutorial #dsa #javaprogramming

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