Core Java
String, Wrapper classes, and essential Java APIs.
Topics
🏗️ Constructors in Java
Complete guide to constructors, default vs no-args, parameterized, overloading, chaining, and private constructors for controlled instantiation.
🧠 Memory Management & Garbage Collection
Stack vs Heap, GC algorithms, generational collection, memory leaks, and reference types (Strong, Weak, Soft).