java

Java keywords are reserved words. You use them to build Java programs. Each keyword has a special meaning to the Java compiler. This helps you write clear and functional code.

Java is an object-oriented language. It enables us to organise our program into simpler logical units known as objects and offers abstraction, encapsulation, inheritance and polymorphism. OOP is a methodology by which one can design a program by implementing classes and their objects. What is Abstract Class ?  An abstract class is a class that

Java HashSet removes duplicate items automatically. This means you don’t need to write extra code to check for duplicates. It keeps your data clean and unique. Imagine building an e-commerce site where every product needs a unique ID, or managing a list of users currently logged into your application. HashSet makes these tasks simple and efficient.

This guide will help you master Java HashSet.

Struts in Java is an open-source framework that is made by Apache. Apache provides a free source to download Struts for users. It follows the MVC (Model View Controller) pattern. There are three models in MVC – Model0, Model1, Model2. It provides an implementation of MVC architecture. It gives us pre-built classes for MVC that

We all know that an object of a particular class contains instance variables, but if we want to perform some operations on the instance variables, we need to initialize them. This is where a constructor comes in. A constructor is defined with the same name as the class. Such a method is called a constructor.

HashMap in Java is a powerful key-value data structure used for fast retrieval and efficient updates. This tutorial covers its internal mechanics, essential operations, iteration methods, and performance considerations, making it a valuable tool for applications like caching, indexing, and frequency counting.

A Java String is an object that represents a sequence of characters. It stores and manipulates text data. You use this to build Java applications.