Feb 18 · 2 min read · to be completed soon… To do : List, Queue, Set Done : Map Broadly there exist 5 distinct group of maps based on their internal behavior & guarantees : General Purpose (Hashing) Ordered (Insertion Sequence) Sorted (Natural / Custom Ordering) ...
Join discussionDec 24, 2025 · 9 min read · I remember my first Java interview. The interviewer asked: "Which collection would you use to store unique user IDs with fast lookup?" I froze. ArrayList? HashMap? HashSet? They all sounded right. And wrong. I mumbled something about ArrayList, added...
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Dec 12, 2025 · 3 min read · 🔥 Java 2 (JDK 1.2) — The Version That Changed Java Forever Here is a complete, deep, structured explanation of Java 2 (JDK 1.2)—including features, architecture, enhancements, API upgrades, examples, limitations, and why this version became a turnin...
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Apr 5, 2025 · 3 min read · [60] Java Collection Framework The Java Collection Framework is a set of classes and interfaces in Java that provide commonly reusable, type-safe and efficient data structures to store and manipulate group of objects. The framework consists of severa...
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Nov 29, 2024 · 37 min read · In the world of programming, data is king. Everything we design, every application we build, revolves around efficiently managing and processing data. From a simple list of tasks in a to-do app to managing millions of customer records in an enterpris...
Join discussionNov 18, 2024 · 13 min read · Imagine you're in a busy kitchen, using different tools to prepare a meal—this is similar to the Java Collections Framework. It provides a set of classes and interfaces to store, manage, and retrieve data in your programs. Just like you have differen...
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Jul 4, 2024 · 4 min read · When choosing the best method to implement a queue in Java, it depends on the specific requirements of your application. Different Queue implementations in the Java Collections Framework (JCF) offer various advantages and trade-offs. Let’s explore so...
Join discussionJul 4, 2024 · 5 min read · In the realm of data structures, the queue stands out for its simplicity and utility. A queue follows the First-In-First-Out (FIFO) principle, making it essential for managing tasks where order matters. Think of it as a line at a grocery store – the ...
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Jun 4, 2024 · 4 min read · What is Java Collections Framework - JCF? JCF Added in Java version 1.2 Collections is nothing but a group of Objects. Present in java.util package. Framework provide us the architecture to manage these "group of objects" i.e add, update, delete,...
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Apr 26, 2024 · 7 min read · A HashMap is a part of the Java's Collection and is used to store key-value pairs. Each key is mapped to a single value, and while duplicate keys are not allowed, duplicate values are permitted. We will learn about how a HashMap works internally, how...
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