Kalana Heshan

  Object-Oriented Programming (OOP) is a powerful paradigm that allows developers to model real-world entities in software by organizing code into objects. One of the key principles that make OOP flexible and efficient is polymorphism. Polymorphism, derived from the Greek words "poly" (many) and "morphos" (forms), enables objects of different types to be treated as objects of a common type. This concept plays a crucial role in enhancing code reusability, flexibility, and maintainability. Polymorphism Fundamentals: At its core, polymorphism allows objects to be treated as instances of their base class rather than their actual derived class. This is achieved through two main mechanisms: compile-time (static) polymorphism and runtime (dynamic) polymorphism. Compile-time Polymorphism: Also known as method overloading, this form of polymorphism occurs when multiple methods in the same class have the same name but differ in their parameter types or number of parameters. ...

  Java, a versatile and widely-used programming language, embraces the principles of Object-Oriented Programming (OOP). One of the essential concepts in OOP is casting, which allows developers to convert objects from one type to another. Understanding the nuances of casting in Java is crucial for writing flexible and robust code. In this article, we'll explore the fundamentals of casting in Java, different types of casting, and best practices to ensure effective and error-free code. The Basics of Casting in Java 1. Upcasting in Java: Upcasting involves converting an object of a subclass to its superclass. This operation is implicitly performed by the Java compiler because every instance of a subclass is also an instance of its superclass. Consider the following example: Superclass superObj = new Subclass(); Here, superObj is a reference to an object of the superclass that actually points to an instance of the subclass. 2. Downcasting in Java: Downcasting is the process of converti...