Java 21 Coding Example- Hospital Management System Core Java java Java 21 jdk 20 Programming by devs5003 - April 10, 2025April 17, 20250 This article presents an implementation of a Hospital Management System using Java 21. If we say using Java 21, it means we are free to use all the final features that are available till Java 21. It doesn't matter whether a particular feature belongs to Java 8 or Java 21. The used feature should be available till Java 21. Our focus would be on some progressive features such as sealed classes, records, pattern matching in switch, immutable collections, and formatted string output. Along the way, we’ll also explore how these features simplify code design, improve safety, and enhance readability. The primary target of this article is to practice the most important & latest features of Java in a real world use
Java 21 vs Java 17 vs Java 8 Implementation – Hotel Room Booking System Core Java java Java 17 Java 21 Java 8 by devs5003 - April 3, 2025April 10, 20250 Java 21 vs Java 17 vs Java 8 Implementation Java has offered powerful features with each new version significantly over the years, that enhance developer productivity, code readability, and performance. In this analysis based article, we will explore the Hotel Room Booking System implemented in Java 8, Java 17, and Java 21, and compare how modern Java features simplify development while maintaining backward compatibility. This comparison should also helpful as a practical guide for developers considering migration or simply wanting to leverage modern Java effectively. The Hotel Booking System is a real-world use case that involves Dynamic pricing (room types, discounts), Business rules (membership benefits, seasonal offers) & Concurrency (parallel processing for bulk bookings). In this implementation we will Compare coding styles – from verbose Java 8 to concise
How to Sort List by Date in Java 8 ? java Core Java Java 8 by devs5003 - March 31, 2025April 10, 20250 Sorting a List by Date sometimes becomes a bit tricky. One of the tricky part is how to handle date format and then perform the sorting. In this article 'How to Sort List by Date in Java 8 ?', we will discuss sorting of three types of Dates. These are java.util.Date, java.time.LocalDate and java.time.LocalDateTime. Further, in order to sort the list, we will use three approaches. Using these approaches, we will utilize the new concepts introduced in Java 8. Moreover, these concepts are Lambda Expressions, Method References and Stream API. Additionally, if you want to know how to sort a general list in Java 8, we have separate article on 'How To Sort the List In Java 8?'. Here we will
What are Preview Features in Java? Core Java java by devs5003 - March 24, 2025March 27, 20250 In every new version of Java, one word is definitely seen and that is 'Preview Feature'. Some of us know about it, but some people like beginners don't know. Even if one who knows, there is no proper clarity about it. Therefore, in this article, we will discuss in detail all about 'Preview Features in Java'. Learning Preview Features in Java helps developers stay updated with new improvements before they become permanent. It allows early testing, reduces future migration efforts, and improves coding efficiency. Developers can also provide feedback to shape Java’s future. Understanding these features ensures better decision-making and keeps you ahead in the Java ecosystem. What are Preview Features in Java? Preview features are new functionalities introduced in Java that are
Java 24 New Features With Examples Core Java java Java 24 by devs5003 - March 20, 2025March 23, 20250 Java Development Kit 24, the next version of Java Standard Edition, is now available as a production release on March 18, 2024. Java 24 introduces several noticeable features intended at enhancing the language's capabilities, performance, and security. We will explore an overview of these features, complimented by example code snippets for better understanding. In this article, we will explore some of the most essential developer’s friendly Java 24 new features with examples. You may also go through the nearest LTS version Java 21 New Features With Examples. For other version's features, kindly visit Java Features After Java 8. Java 24 New Features With Examples How to enable Preview Features of Java 24? To compile and run code that contains preview features, we must specify additional command-line
Java Developer Roadmap Core Java java by devs5003 - March 13, 2025March 17, 20250 Java Developer Roadmap: A Guide to Beginners & Experts Java has been one of the most popular programming languages for over twenty-eight years, and it is still in demand within the tech industry. More than nine million developers currently use Java as their primary programming language; thus, it is clear that Java has passed the test of time and continues to be a popular choice for creating robust, scalable, and security-centric applications. To pursue a career as a Java developer, there is a systematic path you could need to follow to become proficient in these skills. This Java Developer Roadmap will take you through the must-learn stages in your journey on Java and stand out a career for you as a successful
Flyweight Design Pattern With Examples Using Java 21 Core Java Design Patterns java Java 21 jdk 21 by devs5003 - January 29, 2025February 1, 20251 Flyweight Design Pattern in Java: A Comprehensive Guide The Flyweight Design Pattern is one of the structural design patterns introduced by the Gang of Four (GoF). It focuses on minimizing memory usage and improving performance by sharing as much data as possible with other similar objects. This pattern is particularly useful in applications where a large number of objects with similar characteristics are required. In this article, we will dive deep into the Flyweight pattern, understand its components, explore its advantages and limitations, and look at real-world use cases. We will also implement the pattern in Java with clear, concise examples to solidify the concepts. What is the Flyweight Pattern? The Flyweight Pattern is designed to reduce the number of objects created and decrease
Java Records vs JPA Entities and Lombok Core Java java JPA Lombok Lombok Java Record In Java by devs5003 - January 22, 2025January 25, 20251 Java Records vs JPA Entities and Lombok: A Comprehensive Comparison JPA entities are the basic concepts for those who have developed a Java project using JPA or any JPA based framework such as Hibernate. While developing such project, we create an entity class as the first step. After the introduction of Record classes, it becomes a part of discussion whether we can use Records in place of Entities or not. Java Records provide a concise way to define immutable data objects. On the other hand, JPA Entities are the backbone of persistence in Java applications, that allow objects to be stored and retrieved from databases. This article explores the similarities, differences, and use cases for Java Records and JPA Entities, with examples, pros,
Java Design Patterns Core Java Design Design Patterns java by devs5003 - January 20, 2025April 21, 20250 If you want to learn 'Java Design Patterns' in less time without missing any concept, you are at the right place. Moreover, if you want to appear in a Java interview, go through this article once. Additionally, If you want to have a quick revision of your concepts on Java Design Patterns which you had learnt a log time before, then also you are at the right place. However, if you are looking for one liner definition of each Design Pattern to memorize them, then also you are at the right place. Then, visit the last section of this article (Design Pattern's Cheat Sheet). In this article, we will discuss about all GoF (Gang of Four) design patterns. The 23 design
How to Configure JDK in Eclipse or STS Core Java IDE java by devs5003 - January 17, 2025January 17, 20250 How to Configure JDK in Eclipse or STS ? Configuring the Java Development Kit (JDK) in Eclipse or Spring Tool Suite (STS) is a crucial step for any Java developer. Whether you are a beginner or intermediate in java development, you might face some issue in configuring JDK in your IDE such as Eclipse or STS. This guide provides a detailed step-by-step process for configuring JDK in Eclipse or STS, along with common errors and their solutions. Prerequisites Before proceeding with JDK configuration, make sure that you have the following in your system: JDK Installation: Download and install the latest version of the JDK from Oracle's official website or OpenJDK if you don't have it already. Eclipse or STS Installation: Download and install the latest