ArrayList in Java – Internals, Performance, and Best Practices
Learn how Java ArrayList works under the hood, explore its performance characteristics, best practices, and common pitfalls with code examples
Tutorials under 'Java 21'
LinkedList in Java – How It Works and When to Use It
Understand LinkedList in Java with internal working, performance benchmarks, best practices, real-world use cases, and differences with ArrayList.
Java Set Interface – Core Concepts and Use Cases
Master the Java Set interface with internal workings, performance analysis, use cases, and functional programming examples from Java 8 to Java 21
HashSet in Java – How It Works Internally
Understand how HashSet works internally in Java with HashMap, performance insights, code examples, and best practices for real-world development
LinkedHashSet in Java – Preserving Insertion Order
Learn how LinkedHashSet in Java preserves insertion order, how it works internally, and how to use it effectively in modern Java applications
TreeSet in Java – Sorted Set with Red-Black Tree Internals
Explore TreeSet in Java with Red-Black Tree internals, performance characteristics, use cases, and modern Java examples for sorted unique collections
HashSet vs TreeSet vs LinkedHashSet – Comparison Table and Best Use Cases
Compare HashSet, TreeSet, and LinkedHashSet in Java. Understand their differences, internal workings, performance, and best use cases with real code
Java Queue Interface – FIFO Explained with Examples
Master the Java Queue interface with FIFO behavior, real-world examples, performance insights, internal workings, and best practices using Java 8–21.
PriorityQueue in Java – Min-Heap Implementation Explained
Learn how PriorityQueue works in Java with min-heap internals, performance, use cases, and Java 8–21 functional examples and comparisons
IdentityHashMap vs WeakHashMap in Java – Identity vs Equality Explained
Learn the difference between IdentityHashMap and WeakHashMap in Java, with internal working, use cases, memory model, and expert-level best practices
NavigableMap and NavigableSet in Java – HeadMap, TailMap, and More Explained
Learn how NavigableMap and NavigableSet work in Java with HeadMap, TailMap, descending views, and more. Includes real-world use cases and examples
TreeMap vs ConcurrentSkipListMap in Java – Ordered Concurrent Maps Compared
Compare TreeMap and ConcurrentSkipListMap in Java for ordered key-value storage, concurrency, performance, and use cases with practical code examples
How Java 8 Changed Collections – Streams, Lambdas, and Functional APIs Explained
Explore how Java 8 revolutionized the Collections Framework with Streams, Lambdas, Collectors, and more. Boost performance and readability with modern Java.
Creating Custom Iterable and Iterator in Java – Complete Guide with Examples
Learn how to create your own Iterable and Iterator in Java with full code examples, internal workings, and best practices. Ideal for mastering Java collections.
How to Build a Custom HashMap or HashSet in Java – Internals, Code, and Best Practices
Learn how to build a custom HashMap or HashSet from scratch in Java. Understand internal hashing, performance, and use cases with full code examples
Serialization and Deserialization of Collections in Java – Complete Guide with Examples
Learn how to serialize and deserialize Java Collections like List, Set, and Map. Covers best practices, code examples, and pitfalls to avoid
Using Collections in Microservices and REST APIs – Best Practices for Java Developers
Learn how to use Java Collections effectively in Microservices and REST APIs. Covers best practices, serialization, immutability, and DTO design
Designing Read-Only and Unmodifiable Collections in Java – Best Practices and Examples
Learn how to design and use read-only and unmodifiable collections in Java for immutability, thread safety, and clean architecture. Includes code examples and pitfalls
Defensive Copying with Java Collections – Best Practices and Examples
Learn how to use defensive copying in Java Collections to prevent bugs, ensure immutability, and build secure APIs. Includes code examples and best practices.
Collections in Java Design Patterns – Leveraging Lists, Maps, and Sets in Factory, Strategy, and More
Explore how Java Collections like List, Map, and Set are used in design patterns such as Factory, Strategy, and Observer. Learn real-world usage with examples.