What is Inheritance in Java? Inheritance In java is a feature that allows a class to extend the functionality of another class by directly deriving from it. The derived class has access to all the public and protected variables and methods of the base class. Inheritance allows adding functionalities over and above those defined in … Read more

What is Abstraction in Object Oriented Programming? Abstraction in java is used to hide the complexity of a system by exposing the method signature of the system but concealing its implementation. Java implements abstraction using interface and abstract class and so it would be easier to explain abstraction by explaining what interfaces and abstract classes … Read more

What is Object Oriented Programming (OOP)? Object Oriented programming is a programming paradigm wherein all information is stored within the object and all ‘actions’ are performed by the objects. In the first tutorial, we explained the concept of Objects and classes. We defined “class” as a template that stores information about the state(customer’s name, address … Read more

What is polymorphism in Java? Polymorphism in Java is the principle by which an object can have multiple forms but each form conforms to a contract. Polymorphism can be thought of as a direct consequence of abstraction. In the earlier section, we say how abstraction separates method definition from its implementation. When we have two … Read more

What is Encapsulation in Java? Encapsulation in java is a principle by which data is hidden in an Object and can be accessed by the outside world only through accessor methods. The simplest way to understand encapsulation is to look at the basic data types such as Integer or Double. These data types hide the … Read more

What are the Access Modifiers in Java? Access Modifiers in Java control access to classes, methods, and variables. There are four basic access modifiers and they are public, protected, private and no modifier (Default). We will use the word default instead of no modifier for the rest of the tutorial. Here’s a summary of the … Read more

What does the import statement in java do? In an earlier tutorial we saw an introduction to java. In this tutorial, we will look at using imports in java. To state it plainly – import statements allows us to use the name of the class in our code instead of its fully qualified name. What … Read more