Abstraction is one of the main pillars of OOPS in Java. In simple words, abstraction can be used to hide unwanted data from the users and only important data is visible to the users. For Example, The outer structure of a bike is visible to people instead of seeing all components within the bike. Abstraction …
Method overloading states that we can have methods with the same name but something in their parameters should be different. If you know about constructor overloading then it is pretty similar to method overloading. Method overloading helps us from writing the same methods under different names. For example, a method involving multiplication of 2 numbers …
In this article, we will learn about covariant return types in Java. Before Java version 5.0, we could not change the return type of an overridden method but a new method was introduced in JDK 5.0, called covariant where we could change the return type of the overridden method. The return type must be non-primitive. …
This article will look at how we can use Java Reflection API to invoke a Static method. We will see the steps and the explanation with code. Let us first have a quick look at Reflection API. Reflection in Java is a process of examining or modifying the behavior of a class at run time. …
To find out whether constructor returns any value or not, let’s learn about a constructor? In simple terms, the constructor is a special method, which is used to initialize an instance of a class. This special method differs from the actual methods of classes. The name of a constructor is always similar to the name …
As programmers work with real-life entities, object-oriented programming allows programmers to achieve the same. Objects are used to store knowledge, data, task, state, and other different OOP tasks and methods. This article is going to explain the fundamental four pillars of object oriented programming in java. Image Source 1. Encapsulation Encapsulation is achieved when the …
In this article, we will see what is a global variable and how we can use this in our Java programs. In Java, all the functions and data members are declared inside a class and every declaration has to be done inside it. If we declare them outside the class, then they would not be …
In this article, we will learn how to access variable from another class in java. There are two ways to get variables from another class. Create an object of another class in the main class Extend another class in the main class Let us take a look at both these methods one by one with …
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