Author Archives: Stanislav_Panteleev

🗑️ What Happened to the JRE? Before Java 11 You could download either: ✅ JDK (for development)✅ JRE (for just running programs — without compiler/tools)

📦 1️⃣ JVM (Java Virtual Machine) What is it? ✅ The JVM is the heart of Java.✅ It’s responsible for actually executing the bytecode (the compiled .class files).✅ The JVM is platform-dependent (each OS has its own implementation), but the … Continue reading →

Understanding static binding and dynamic binding is crucial for mastering method calls and polymorphism in Object-Oriented Programming, especially in languages like Java.

This is one of the most common areas of confusion when learning about object-oriented relationships. Let me break it down for you in a clear and practical way.

The expressions “is” and “has” are super important when designing object-oriented systems. They help you decide how classes and objects relate to each other — and this directly ties into Inheritance and Composition, two fundamental OOP techniques.

✅ Advantages of Object-Oriented Programming 1️⃣ Encapsulation — Data Hiding & Controlled Access Objects hide internal state and expose only necessary operations. This reduces the risk of accidental changes to internal data. Example: A BankAccount class hides its balance and … Continue reading →

💣 What Happens if You Store Huge Objects in Static Fields? 🔗 First, What are Static Fields? Static fields belong to the class itself, not to any individual object. They live in the Method Area (part of Metaspace in modern … Continue reading →

Let’s walk through how classes, objects, and interfaces are stored in the JVM memory model — this is important not just for OOP understanding, but also for performance tuning and debugging.

📚 1. Class What is a Class? A class is a blueprint or template for creating objects. It defines: ✅ Attributes (fields or properties — data that the object will have)✅ Methods (behavior — what the object can do)

📩 What is Messaging in OOP? Messaging refers to objects communicating with each other by calling each other’s methods. In other words, one object sends a message to another object to request some behavior (or action).