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Abstract Class vs Interface in Java: Key Differences Explained

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Introduction to Abstract Classes and Interfaces in Java In object-oriented programming, Java provides two key constructs for defining the structure and behaviour of classes: abstract classes and interfaces. Both are essential for creating a flexible and modular codebase, but they serve different purposes and have unique characteristics. Understanding the differences between abstract classes and interfaces is crucial for Java developers to design and implement robust software systems. What is an Abstract Class? In Java, an abstract class is a class that cannot be instantiated on its own and is meant to be subclassed. It can contain both abstract methods (without a body) and concrete methods (with an implementation). Abstract classes are used to define a common template for a group of subclasses. Let's illustrate this with an example where we have a superclass Animal with an abstract method makeSound(). Different subclasses such as Dog and Cat will provide their own implementations o

Mastering Singleton Design Pattern in Java: A Comprehensive Guide

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Singleton Pattern says that just "define a class that has only one instance and provides a global point of access to it". In other words, a class must ensure that only single instance should be created and single object can be used by all other classes. There are two forms of singleton design pattern Early Instantiation:      Early instantiation in the Singleton design pattern refers to the approach where the single instance of the class is created eagerly, i.e., as soon as the class is loaded by the Java Virtual Machine (JVM) or at the time of class loading. This means that the intance is created regardless of whether it is immediately needed or not. Early Instantiation Example Early Instantiation in this example: The instance  variable is declared as private and final, making it a constant, ensuring that can be assigned only once. The constructor of the class is made private to prevent external instantiation. The instance is created and assigned at the time of class loading

Introduction to JDBC (Java Database Connectivity)

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JDBC stands for Java Database Connectivity. JDBC is a Java API to connect and execute the query with the database. It is a specific from Sun Microsystem that provide a standard abstraction(API or Protocol) Java Database Connectivity (JDBC) is an application programming interface (API) which defines how a client may access a database. JDBC is like a bridge between a Java application and a database. for Java application to communicate with various databases. It provides the language with Java database connectivity standards, It is used to write programs required to access databases. JDBC, along with the database driver, can access databases and spreadsheets. The enterprise data stored in a relational database(RDB) can be accessed with the help of JDBC APIs. Definition of JDBC (Java Database Connectivity) JDBC is an API(Application Programming interface) used in Java programing to interact with database. The classes and interface of JDBC allow the application to send requests made by user

Unlocking Peak Performance: The Role of RAM in Computing and Why It Matters for Disk Optimization

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Ram & Disk in Computer RAM, or random access memory, is a critical component in every computing device, be it a smartphone, tablet, or computer. It serves as the temporary workspace that your device relies on for running applications and managing current data. Insufficient RAM can lead to a sluggish and frustrating computing experience, as it directly impacts your device's performance. In essence, RAM is the real-time memory that allows your computer to function seamlessly. It's important to distinguish RAM from long-term storage devices like hard disk drives and solid-state drives. Unlike these storage options that retain data even when the computer is turned off, RAM only holds data while it's actively being used. Once the computer is shut down, any information stored in RAM is wiped clean. In essence, RAM plays a crucial role in ensuring your device's smooth operation, making it a fundamental component for optimal performance. Let's break down how the CPU use

Understanding Objects in Java: A Comprehensive Guide with Examples

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 Introduction: Java, a versatile and widely used programming language, is known for its object-oriented nature. Objects are fundamental building blocks in Java, enabling developers to create modular, reusable, and efficient code. In this article, we will delve into the concept of objects in Java, their significance, how to create them, and where they are stored in a computer's memory. Table of Contents: 1. What are Objects in Java? 2. The Significance of Objects: Why Use Them in Java Programs 3. Creating Objects in Java: A Step-by-Step Guide 4. Object Storage in Computer Memory 5. Real-World Examples of Objects in Java Programs 6. Best Practices for Working with Objects in Java 7. Conclusion 1. What are Objects in Java? In Java, an object is an instance of a class. A class is a blueprint or template that defines the structure and behavior of objects. Objects encapsulate data and methods, providing a means to model real-world entities in software. We can also define an object is an

Stream API in Java 8: A Comprehensive Guide

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  Introduction: Stream API is one of the most significant features introduced in Java 8. It provides a powerful and efficient way to process data by allowing developers to perform a sequence of operations on a collection of objects. In this comprehensive guide, we will dive into the Stream API in Java 8 and explore how it can be used to process data effectively. Stream API is used to process collections of objects. A Stream API is a sequence of objects that support various methods which can be pipelined to produce the desired result. Features of Java Streams API: A Stream is not a data structure instead it takes input from the collections, Arrays, or I/O channels. Streams don't change the original data structure, they only provide the result as per the pipelined methods. Each intermediate operation are lazily executed and returned a stream as a result, hence various intermediate operation can be pipelined. Terminal operation mark the end of the stream and returns the result. 1. Wha

Understanding Object-Oriented Programming (OOP) in Java ( Abstraction | Encapsulation | Inheritance | Polymorphism )

 3. Inheritance in Java