Interview Questions, Answers and Tutorials

Category: 3.2 Inheritance

Access modifiers

Access modifiers in Java play a crucial role in controlling the visibility and accessibility of classes, methods, and variables within a program. Imagine you have a magical kingdom of code, and these access modifiers act as gates and keys, determining who can enter or interact with different parts of your kingdom. There are four main types of access modifiers in Java: public, protected, default (package-private), and private. Let’s explore each one with simple examples. In this example, anyone in the kingdom can access the treasure variable and use the openGate method freely. Here, only classes within the same package or…

Overriding methods

Hey there, future coding masterminds! Today, we’re going to embark on an exciting journey into the world of Java programming. Buckle up and get ready to dive into the fascinating concept of “overriding methods.” What is Overriding? Imagine you have a robot that can perform different tasks, like dancing or singing. Now, let’s say you want to upgrade your robot and make it dance even better. Instead of building a new robot from scratch, you decide to take the existing dancing function and improve it. This is similar to what we do in programming when we talk about “overriding.” In…

Extending classes

Hello there! Today, we’re going to talk about a concept in programming called “Extending Classes.” Imagine you have a super cool robot, and you want to create an even cooler robot that can do more things. That’s where extending classes comes in handy! What is a Class? First things first, let’s understand what a class is. In Java (which is a programming language), a class is like a blueprint for creating objects. An object is like a real thing, and the class tells the computer how to make it. Why Extend Classes? Now, let’s say you have a class called…