Java-course-2025

Introduction to Java Packages In Java, a package is a way to make a group of similar classes, interfaces, and sub-packages together under one name. You can think of it like a folder on our computer that stores similar files. Packages make our Java projects more organized, easy to manage, and scalable as they grow … Read more

Encapsulation is one of the four main pillars of Object-Oriented Programming (OOP), along with inheritance, polymorphism, and abstraction. It means binding data (variables) and methods (functions) that operate on that data into a single unit, known as a class. In simple words, encapsulation is like keeping data safe inside a box, where the box decides … Read more

Modifiers are special keywords that you can use to define or control the behavior, accessibility, and properties of classes, methods, constructors, or variables. It helps programmers to control access to data and methods, and organize code in a secure and structured way. Without modifiers, all classes, methods, and variables would be open by default, which … Read more

A constructor is a special block of code that we can use to initialize objects of a class. Think of it as a setup method that prepares an object with default or initial values when it is created. A constructor has no return type, and its name must exactly match the class name. Java automatically … Read more

Introduction to Class Attributes We can define variables inside a class that represent the properties or characteristics of the objects; it is called Java class attributes. Every object of a class can have its own set of values for these attributes, allowing each object to maintain its individual state. This concept is essential because attributes … Read more

Java is a powerful object-oriented programming language that focuses on the concept of classes and objects. These two parts are the building blocks of Java programming and are important for writing structured and reusable code. With this concept, you will understand how classes and objects helps you to think like a real programmer and design … Read more

Java is a fully object-oriented programming language, which means most of its structure revolves around the concept of objects and classes. Instead of focusing only on actions or logic (like in procedural programming), Java organizes everything around real-world entities, such as a car, student, or bank account each represented as an object with its own … Read more

Introduction to Java Recursion Recursion is a special technique where a method solves a problem by calling itself. You don’t need to write repetitive loops or manually break a problem into steps, because recursion allows the problem to be divided into smaller, more manageable sub-problems, and each solved using the same method. In simple words, … Read more

Introduction to Java Scope In Java, scope defines where a variable can be accessed and how long it exists in the program. It tells the programmer which parts of the code can use a particular variable and for how long the variable will stay in memory. We can write clean, safe, and error-free programs using … Read more

Introduction to Method Overloading In Java, method overloading is a powerful feature that allows you to define multiple methods with the same name in a single class, as long as each method has a different set of parameters. This concept helps make your code cleaner, more readable, and flexible, as you can use a single … Read more