Browse the complete Oops In Java tutorial series with example-driven, step-by-step guides.
Learn Object-Oriented Programming (OOP) in Java with real-world examples, best practices, FAQs, and expert tips. Ideal for both beginners and pros.
Learn everything about classes and objects in Java. Ideal for beginners and professionals. Covers syntax, examples, best practices, and FAQs.
Learn how to create and use objects in Java with code examples, syntax rules, best practices, and FAQs. A must-read for Java beginners and experts
Learn encapsulation in Java with real-world examples, UML diagrams, and code walkthroughs. Understand its role in OOP and enterprise Java design
Learn abstraction in Java using simple terms, real-world examples, and modern syntax. Covers abstract classes, interfaces, and design best practices.
Learn inheritance in Java with syntax, real-world examples, best practices, and Java 17+ features like sealed classes. Ideal for Java beginners and pros.
Learn polymorphism in Java with in-depth coverage of method overloading and overriding, real-world examples, best practices, and Java 17+ features.
Learn the core differences between OOP and procedural programming in Java. Covers concepts, syntax, pros, cons, and real-world use cases with examples
Learn Java constructors in depth. Understand default, parameterized, and copy constructors with syntax, examples, use cases, and Java 17+ updates
Learn what getters and setters are in Java, how they help with encapsulation, when to use them, and how they work with modern Java features like records
Learn the difference between static and non-static in Java. Covers syntax, use cases, pros/cons, real-world examples, edge cases, and best practices
Understand the ‘this’ keyword in Java. Learn how it works, when to use it, common pitfalls, and real-world OOP examples with code and best practices.
Understand the IS-A vs HAS-A relationship in Java. Learn when to use inheritance or composition, with syntax, real-world examples, UML, and best practices.
Learn Java access modifiers – public, private, protected, and default – with syntax, examples, use cases, and OOP principles. Perfect for beginners and pros.
Understand the role of `final` keyword in Java OOP—learn how final classes, methods, and variables impact design, inheritance, and flexibility
Understand Java abstract classes with real-world examples. Learn when to use them, how they differ from interfaces, and their role in OOP design.
Learn everything about interfaces in Java with real-world examples, syntax breakdowns, best practices, UML, Java 21 notes, and expert-level FAQs
Understand the key differences between interface and abstract class in Java with real-world use cases, code examples, best practices, and FAQs
Learn how polymorphism drives loose coupling and scalable software architecture in Java. Includes real-world use cases, examples, UML, and best practices.
Discover why composition is preferred over inheritance in modern Java OOP design. Learn best practices, examples, and real-world use cases for clean architecture.
Master the differences between method overloading and overriding in Java. Learn syntax, use cases, pitfalls, and design tips with code and real-world examples.
Learn how constructors behave in Java inheritance, including super() rules, chaining, edge cases, and real-world best practices for clean subclass design.
Understand the role of Java's Object class and how to override equals(), hashCode(), and toString() for clean, consistent, and bug-free Java applications.
Master upcasting and downcasting in Java OOP with clear examples, class diagrams, use cases, and pitfalls. Learn how and when to use type casting in inheritance
Learn SOLID principles in Java with real-world examples, clean code practices, UML-style illustrations, and refactoring tips for scalable object-oriented design
Learn the Liskov Substitution Principle in Java with real-world examples, common pitfalls, and practical refactorings to write clean, robust OOP code.
Learn how to apply Dependency Inversion and Interface Segregation in Java for clean, testable, and loosely coupled object-oriented designs
Learn object-oriented design patterns in Java with real-world examples, UML diagrams, and best practices to write scalable, clean, and reusable code
Understand the Open-Closed Principle in Java OOP. Learn how to build flexible, extensible software by writing code that is open for extension, closed for modification
Discover how Java’s object-oriented programming model empowers test-driven development with reusable, modular, and easily testable code structures
Avoid common OOP pitfalls in Java by learning key anti-patterns, their impact, and how to refactor them for clean, modular design
Learn how to design and use immutable objects in Java for better code safety, thread-safety, and maintainability in modern OOP applications
