Comparable vs Comparator in Java: Differences, Use-Cases & Best Practices
Learn when to use Comparable or Comparator in Java, understand natural vs custom sorting, and see clear code examples with Collections.sort and Stream.sorted.
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Java Source File Rules: Naming, Public Classes, and Compilation Explained
Learn the essential rules for writing Java source files, including file naming conventions, public class restrictions, main method behavior, and how the compiler handles errors.
Java Virtual Machine (JVM): Internal Architecture and Key Concepts Explained
Understand what JVM is, how it works, and its internal architecture. Learn the difference between JDK, JRE, and JVM with simplified diagrams and questions.
What Is a Database? Data vs Information & Why DBMS Beats Flat-Files
Learn the difference between data and information, understand what a database really is, and see how a modern DBMS solves the security, redundancy, and management headaches of flat-file systems.
What is Java? Features, Compiler vs Interpreter Explained
Learn what Java is, its key features, and how compilers differ from interpreters. Understand platform independence, object-orientation, and more.
SOLID Principles in Java with Code Examples
Master SOLID principles in Java with real-world code examples. Learn Single Responsibility, Open/Closed, Liskov, Interface Segregation, and Dependency Inversion.
Introduction to Design Patterns in Java – Gang of Four Guide
Learn what design patterns are, why they matter, and how they help Java developers write clean, modular, and testable code. Covers all 23 GoF patterns categorized into creational, structural, and behavioral types.