Browse the complete Java Collections tutorial series with example-driven, step-by-step guides.
Learn what Java Collections are, how they work internally, and why they’re essential in real-world Java development. Includes syntax, use cases, and tips
Learn the Java Collection Framework hierarchy with diagrams, examples, and real-world use cases. Covers performance, Java 8+ changes, and best practices
Learn the difference between Java's Collection interface and Collections utility class with examples, use cases, and best practices
Master Java's Iterable, Collection, and Iterator interfaces with clear examples, real-world use cases, and best practices for iteration and data handling
Understand the differences between List, Set, and Map in Java. Learn their syntax, use cases, performance, and when to use each with real examples
A developer's cheat sheet for choosing the right collection in Java. Covers List, Set, Map, performance, syntax, use cases, and Java version tips.
Understand how Java Generics work in Collections. Learn syntax, wildcards, use cases, and best practices with real examples for Lists, Sets, and Maps
Compare Java arrays and collections to decide when to use each. Learn performance, syntax, use cases, and best practices in real-world Java development
Avoid common Java Collections mistakes with this practical guide. Learn performance traps, misuse patterns, and how to write cleaner, safer code
Learn how to use Java's collection factory methods like List.of(), Set.of(), and Map.of(). Covers syntax, use cases, immutability, and pitfalls
Understand the Java List interface, its features, real-world use cases, and performance considerations with code examples and best practices
Learn how Java ArrayList works under the hood, explore its performance characteristics, best practices, and common pitfalls with code examples
Understand LinkedList in Java with internal working, performance benchmarks, best practices, real-world use cases, and differences with ArrayList.
Explore the legacy Vector and Stack classes in Java. Learn how they work, when to use them, and their modern alternatives in Java 8–21.
Compare ArrayList, LinkedList, and Vector in Java. Learn their internals, performance, and use cases to choose the best list for your project.
Master the Java Set interface with internal workings, performance analysis, use cases, and functional programming examples from Java 8 to Java 21
Understand how HashSet works internally in Java with HashMap, performance insights, code examples, and best practices for real-world development
Learn how LinkedHashSet in Java preserves insertion order, how it works internally, and how to use it effectively in modern Java applications
Explore TreeSet in Java with Red-Black Tree internals, performance characteristics, use cases, and modern Java examples for sorted unique collections
Compare HashSet, TreeSet, and LinkedHashSet in Java. Understand their differences, internal workings, performance, and best use cases with real code
Master the Java Queue interface with FIFO behavior, real-world examples, performance insights, internal workings, and best practices using Java 8–21.
Learn how PriorityQueue works in Java with min-heap internals, performance, use cases, and Java 8–21 functional examples and comparisons
Master Deque and ArrayDeque in Java. Learn internal workings, real-world use cases, code examples, performance tips, and Java version updates
Understand how Java's LinkedList implements both Queue and Deque interfaces. Explore syntax, internals, use cases, and performance
Learn everything about the Java Map interface – syntax, internal working, hashing, and performance tips with real-world examples and Java 8+ features
Master Java’s HashMap – Learn internal working, hashing, performance, memory model, and modern best practices for high-performance Java development.
Understand LinkedHashMap in Java – its internal structure, insertion vs access order, performance, Java 8+ features, and best practices with real-world examples
Learn TreeMap in Java – how it maintains sorted order using Red-Black Tree, its API, performance, Java 8+ features, and best practices for real-world use.
Dive into Java’s legacy Map implementations – Hashtable and Properties. Learn their internals, usage, differences, and best practices for modern Java development
Learn Java’s specialized maps – EnumMap and WeakHashMap. Explore their structure, use cases, performance, memory model, and real-world applications
Understand the key differences between HashMap, TreeMap, and LinkedHashMap. Learn internal working, order, performance, and ideal use cases in Java
Dive deep into Java Collection internals—learn how memory, resizing, and performance affect List, Set, and Map structures with Java 8–21 optimizations
Understand Fail-Fast vs Fail-Safe iterators in Java. Learn internal mechanisms, real-world use cases, Java 8+ enhancements, and best practices for safe iteration
Learn how hashing works in Java’s HashMap with step-by-step explanation, diagrams, memory model, performance details, and Java 8+ enhancements
Learn how Java Collections perform under the hood. Explore Big-O complexities for List, Set, Map, and Queue with real-world guidance and Java 8–21 updates.
Learn all about Java's concurrent collections, their thread-safe implementations, performance benchmarks, and best practices for multithreaded apps
Master CopyOnWriteArrayList and CopyOnWriteArraySet in Java with internals, Big-O performance, use cases, Java 8+ features, and best practices
Understand ConcurrentHashMap internals in Java – from segmented locking in Java 7 to bucket locking in Java 8+, with performance benchmarks and real use cases
Learn how PriorityBlockingQueue and DelayQueue work in Java with real-world examples, performance insights, and best practices for concurrency
Learn how BlockingQueue and LinkedBlockingQueue enable robust producer-consumer patterns in Java with real-world examples and concurrency best practices
Understand the differences between synchronized and concurrent collections in Java, with real-world examples, performance benchmarks, and best practices
Learn the difference between IdentityHashMap and WeakHashMap in Java, with internal working, use cases, memory model, and expert-level best practices
Learn how NavigableMap and NavigableSet work in Java with HeadMap, TailMap, descending views, and more. Includes real-world use cases and examples
Compare TreeMap and ConcurrentSkipListMap in Java for ordered key-value storage, concurrency, performance, and use cases with practical code examples
Explore how Java 8 revolutionized the Collections Framework with Streams, Lambdas, Collectors, and more. Boost performance and readability with modern Java.
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.
Learn how to build a custom HashMap or HashSet from scratch in Java. Understand internal hashing, performance, and use cases with full code examples
Learn how to serialize and deserialize Java Collections like List, Set, and Map. Covers best practices, code examples, and pitfalls to avoid
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
Learn how to use defensive copying in Java Collections to prevent bugs, ensure immutability, and build secure APIs. Includes code examples and best practices.
Learn how to use Java Collections effectively in Microservices and REST APIs. Covers best practices, serialization, immutability, and DTO design
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.
Learn how Java 9's List.of() compares with Collections.unmodifiableList(). Deep dive into syntax, performance, real-world use, and Java version changes.
Explore how Guava, Apache Commons, and third-party libraries improve Java Collections with features like multi-maps, bidirectional maps, and more.
Ace your Java interviews with this exhaustive guide to Java Collections – covering core concepts, internals, pitfalls, best practices, and real-world scenarios.
Learn how to refactor old Java code using outdated collections into modern, efficient, and safer collections with Java 8–21 features and best practices
Avoid pitfalls in Java Collections! Discover common mistakes in Lists, Sets, Maps, and more—learn fixes, performance tips, and real-world examples
Explore how to use Java Collections effectively in real-world applications with a focus on performance tuning, maintainability, and practical use cases
Master Stack, Queue, Graph, and Tree in Java using Collections Framework. Learn performance tips, use cases, and implementation patterns for real-world projects
Explore all the latest updates to the Java Collections API in Java 21. Learn about internal changes, best practices, version differences, and real-world use cases
