Tutorials under 'Java Internals'

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

Java 21Java GenericsJava TutorialJava Data StructuresJava List InterfaceJava 8Java Best PracticesJava Code OptimizationList Vs SetJava CollectionsJava PerformanceJava InternalsJava Interview PrepArrayList Java

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

HashMap InternalsJava 21IdentityHashMapJava 8 StreamsJava CollectionsJava MapWeak ReferencesJava InternalsJava Memory ManagementWeakHashMap

Immutable Collections in Java 9+ – List.of() vs Collections.unmodifiableList()

Learn how Java 9's List.of() compares with Collections.unmodifiableList(). Deep dive into syntax, performance, real-world use, and Java version changes.

Java 21Java 8 FeaturesJava StreamsImmutable CollectionsPerformance TuningJava 9Java Best PracticesUnmodifiableListCollections FrameworkFunctional ProgrammingList.ofJava ListJava CollectionsLegacy CodeJava Internals