Web Reference: ArrayList Operations in Java 🔥 | DSA Day 8 In this video, we learn ArrayList operations in Java in a simple and beginner friendly way. This is an important topic in Data Structures and... Oct 8, 2025 · This beginner-friendly guide covers Data Structures and Algorithms (DSA) in Java, including built-in structures like arrays, strings, ArrayList, HashMap, HashSet, and user-defined structures such as linked lists, stacks, queues, trees, heaps, and graphs. It also explains how to analyze algorithm efficiency. From Java 10, you can use the var keyword to declare an ArrayList variable without writing the type twice. The compiler figures out the type from the value you assign.
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