Java by Apress

Bring your Java skills up to date and discover the full diversity of modern Java! This book guides you step by step through the most important new features up to the current Java 25 LTS, while also drawing on proven highlights from earlier versions. It covers numerous language and syntax improvements, such as switch extensions, records, and text blocks. We also take a look at new API functions related to streams, strings, virtual threads, structured concurrency, and much more. One focus is on the increasingly popular pattern matching, especially in combination with record patterns. The book is rounded off with practical exercises and detailed sample solutions to help you consolidate what you have learned. What You Will Learn: Trace Java’s evolution up to version 25 LTS. Describe key language features like switch, records, and text blocks. Explore pattern matching and record patterns in depth. Assess enhancements in streams and stream gatherer. Apply virtual threads and structured concurrency. Use modern Java features in practical coding scenarios. Identify hidden gems from earlier Java releases. Who This Book is for: Readers already proficient in Java who seek a focused overview of key features introduced in versions 12 through 25 LTS. It targets both emerging developers and seasoned professionals looking to deepen or refresh their understanding for practical application in modern projects.

Upgrade your distributed applications with microservices. This practical guide bridges core concepts and advanced patterns to help you build resilient, scalable and high performing microservices, whether you're transitioning from monolithic architectures or starting fresh with microservices. Fully updated for Spring Boot 3 and Spring Cloud, The Second covers modern capabilities, like reactive programming, enhanced observability, advanced security and streamlined configuration management. Learn to solve common architectural challenges in cloud-native development, including service discovery, inter-service communication, distributed transactions, configuration management and fault tolerance mechanisms like retries, timeouts and circuit breakers. You’ll also implement real-world patterns using powerful frameworks like Axon for event sourcing and command handling, and Atomikos for managing distributed transactions with XA protocols. This book provides a hands-on introduction to building modern cloud-native applications from scratch, building up to in-depth discussions on advanced topics, such as CQRS and event-driven architecture. What You Will Learn: Explore the latest features in Spring Boot 3 and Spring Cloud 2024 Build and manage microservices with, routing, security and interservice communication Apply proven patterns for real-world microservices problems Design event-driven architectures and implement CQRS Enable service discovery, centralized configuration, and resilience with Spring Cloud Handle distributed transactions using XA, and Saga patterns Leverage Axon Framework for event sourcing and command handling Secure services with OAuth2.0 and JWT Learn best practices for testing, fault tolerance and observability Who This Book Is For Java developers and software architects who have a foundational understanding of distributed multi-threaded application architecture. No prior experience with Spring Boot or Spring Cloud is required.

Learn how to build and deploy Java-based cloud native apps with Jakarta EE with the MicroProfile framework and Kubernetes. This revamped Second Edition reflects the latest updates in Jakarta EE 11, including enhanced support for creating web APIs with Jakarta REST, concurrency management with Jakarta Concurrency, and data persistence with Jakarta Persistence, while incorporating key changes introduced by MicroProfile 7.0. After a quick overview of Jakarta EE and MicroProfile, Pro Cloud Native Java EE Apps starts you on your way by walking you through a cloud-native Jakarta EE-based application case study that will be forged piece-by-piece over the course of the book. Next, you'll interject dependencies and data persistence capabilities as microservices to go with the case study app that you are building. Then, you will dive into migrating a monolith to become a production-ready cloud-native app. Finally, you will look ahead to the future of Jakarta EE with a NEW chapter on artificial intelligence and large language models, exploring potential use cases for how AI-integration can enhance Jakarta EE capabilities. This revised new edition ensures you are equipped with the most current tools and techniques to develop forward-looking, cloud-native apps. What You Will Learn !-- [if !supportLists]--● !--[endif]--Build and deploy a production-ready cloud-native Java app using MicroProfile, Jakarta EE and Kubernetes !-- [if !supportLists]--● !--[endif]--Migrate a monolith app to become a cloud-native app !-- [if !supportLists]--● !--[endif]--Employ Jakarta EE APIs such as Persistence, CDI and more !-- [if !supportLists]--● !--[endif]--Leverage the MicroProfile framework !-- [if !supportLists]--● !--[endif]--Explore configurations, resilience, metrics, health, security, and more for your cloud-native apps !-- [if !supportLists]--● !--[endif]--Discover how Jakarta EE integrates with AI and LLMs. Who This Book is for: Those software developers and programmers with at least some prior experience using Jakarta EE, MicroProfile. At least some prior Java experience is expected.

Write your first code in Java 23 using simple, step-by-step examples that model real-word objects and events, making learning easy. With this book you will be able to pick up core programming concepts without fuss and write efficient Java code in no time. Clear code descriptions and layout ensure you get your code running as soon as possible. Author Iuliana Cosmina focuses on practical knowledge and getting you up to speed quickly—all the bits and pieces a novice needs to get started programming in Java. In this edition, you will discover how Java has changed since version 17, and how to design and write code using the most recently introduced Java features such as new collection methods, virtual threads, pattern and record matching in switch expressions, structured concurrency tasks, unnamed classes and instance methods, and many more. This book is a complete Java guide, covering the following topics: setting up a development environment, programming concepts and well-known programming principles, writing Java code following industry-specific design patterns and coding conventions, executing it, debugging, testing, documenting it and even using specialized tools such as IntelliJ IDEA for writing Java code, Maven for building, JUnit Jupiter for testing, and in-memory and Docker-hosted databases or data storage. After reading this book, you’ll have all the necessary skills and knowledge to pass an interview for a starting Java development position. What You Will Learn Set up a Java development environment Use the Java language to write high-quality code Understand fundamental programming concepts and algorithms Use virtual threads, records, and other Java renown features Debug, test, and document Java code Improve performance by customizing the Garbage Collector Who This Book Is For Those who are new to programming and want to learn Java and use it to build efficient solutions

This book is your comprehensive introduction to Project Helidon, Oracle’s Java-based microservices framework for building cloud-native applications. The book introduces the two flavors of Helidon—Helidon SE and Helidon MP—and shows how to quickly build applications with each one. The book begins by placing the Helidon framework in context and explaining the MicroProfile and Jakarta EE specifications that underlie the building of microservices-based applications. From there, you will learn about the individual components of Helidon SE and Helidon MP, and you will see examples of building applications for both flavors, and for MicroProfile and Jakarta EE. Finally, the book shows how to convert Helidon applications from Java bytecode into native binaries for instant application startup and peak performance. What You Will Learn Choose correctly between Helidon SE and Helidon MP Create starter applications using the Helidon SE and Helidon MP quick starts Create server and client applications with Helidon SE components Create a microservices-based application with the MicroProfile specifications Create a database application with the Jakarta NoSQL specification Who This Book Is For Java developers who create microservices applications; those interested in building such applications using the Helidon framework; and developers of microservices applications who want functionality such as native-image support through GraalVM, compatibility with MicroProfile, easy connectivity to database engines, and support for reactive development patterns

Become an expert in implementing observability methods for legacy technologies and discover how to use AIOps and OpenTelemetry to analyze root causes and solve problems in banking and telecommunications. Through this book, you will engage with issues that occur in kernels, networks, CPU, and IO by developing skills to handle traces and logs, as well as Profiles (eBPF) and debugging. The real-world examples in the book will enable you to analyze and aggregate observability data, helping you gain competence in automating systems and resolving business-critical issues rapidly and efficiently. The book will introduce you to new observability approaches, describe different types of errors, and explain how observability addresses them. It will provide training on how to develop dashboards and charts and design a root cause analysis process. Emphasizing trace-centric observability, you will gain expertise in using EAI servers to integrate legacy tech and using extensions to complement the OpenTelemetry Agent. You will also understand the varied practical uses of OpenTelemetry through examples from multiple industries, as well as an OpenTelemetry demo application. The book then takes you through infrastructure observability and infrastructure anomaly detection, enabling you to visualize and trace problems, and helping you identify and proactively respond to anomalies in system resources. In the final chapters, you will learn how to aggregate and analyze observability data using Presto and Druid. Finally, you will familiarize yourself with AIOps and learn how to implement it with Langchain and RAGs. By the end of this book, you will be fully trained in the practical implementation of observability and using observability data to identify, analyze, and solve problems for large industries like finance and telecommunications. What You Will Learn Integrate observability with legacy technology Perform root cause analysis using observability platforms like OpenTelemetry Analyze and aggregate observability data to solve business problems Use AIOps and anomaly detection tools to automate operations and reduce costs Who This Book Is For System developers, data engineers, SREs, infrastructure engineers, system architects, Java developers, and DevOps engineers who are enthusiastic about observability and want to implement it with legacy technology.

Embrace the future of software development! ChatGPT for Java is the perfect starting point for Java developers to learn how to build intelligent applications using ChatGPT and Open AI APIs. This book takes you from the ground up to demonstrate how to use ChatGPT programmatically. You will learn the basics of ChatGPT and OpenAI APIs, including how to authenticate, send prompts, generate responses, test in the Playground, and handle errors. Each chapter includes practical exercises which demonstrate different API functionalities and bring your concepts to life. You will learn how to AI-enable your own applications using models such as GPT-4, GPT-3.5, Whisper, DALL-E, and many more. As a result, developers will understand that generative AI tools will not replace software development jobs! Instead, you will leverage ChatGPT as your Java AI-pair programmer to increase speed and productivity. You will also learn how ChatGPT can provide powerful Natural Language Processing (NLP) capabilities to your Java apps in order to understand various formats of unstructured text. Step-by-step, you will apply the concepts covered to create your own intelligent chatbots that can automatically process messages from either Slack on Discord. With this book, Java developers will be empowered to take their applications to new heights by leveraging the power of AI as this exciting field continues to evolve and transform. What You Will Learn Authenticate with the ChatGPT and OpenAI APIs and learn how to engineer and send prompts Test your prompts in the ChatGPT Playground How to use multiple artificial intelligence models Harness the power the temperature, top_p, and other parameters that can ONLY be accessed by developers to create more unique and engaging responses from ChatGPT Create intelligent bots for Slack or Discord servers Incorporate context into prompts for better responses and apply advanced features of the APIs. Explore future directions for ChatGPT and OpenAI .

Master the art of automated testing using Selenium with Java in this comprehensive guide. Whether you're a beginner or an experienced tester, the book equips you with the knowledge and techniques to build robust and maintainable test suites, ensuring the quality and reliability of your web applications. This book starts introducing the basics of automated testing and the importance of Selenium. It then covers the setup and configuration of the Selenium WebDriver in Java, providing a solid foundation for your testing environment. You'll learn essential aspects of Selenium testing in Java, including working with different browsers, locating web elements using locators, and performing actions on them. From there, you’ll explore how to handle dynamic web pages and effective wait mechanisms and verifications to ensure accurate and reliable test results. The book also guides you in setting up Selenium in Java for continuous integration and emphasizes best practices for test codeorganization and maintainability, such as the Page Object Model (POM) and structuring test suites effectively. By the end, you’ll have the expertise to address advanced scenarios, such as working with iframes, and know how TestNG enhances Selenium automation, enabling structured tests, data-driven insights, and swift parallel executions. Throughout the book, you'll benefit from real-world examples and practical exercises that reinforce the concepts. The clear explanations and step-by-step guidance make it easy to follow along and apply the knowledge to your own testing projects. What You Will Learn Understand the fundamentals of automated testing and the role of Selenium in web application testing Set up the Selenium WebDriver in Java and configure the testing environment Work with different web browsers and their drivers to perform cross-browser testing Identify and locate web elements using various locators, such as IDs, class names, CSS selectors, and XPath expressions Perform actions on web elements, such as clicking buttons, entering text, submitting forms, and navigating through web pages Handle dynamic pages by implementing effective wait mechanisms, including implicit waits, explicit waits, and fluent waits Verify and assert expected conditions and outcomes using assertions and verification techniques provided by Selenium in Java Apply best practices for test code organization and maintainability, including using the Page Object Model (POM) design pattern Handle advanced scenarios, such as working with iframes, and elevating Selenium automation through TestNG’s structured frameworks, data utilization, and parallel processing Who This Book For Software testers, quality assurance professionals, and developers interested in mastering automated testing with Selenium and Java. Suitable for various experience levels. Offers practical insights and techniques to automate web application testing accurately and reliably. Benefits testers, developers, and individuals familiar with Java and web testing, empowering them to write robust, maintainable test code and integrate Selenium seamlessly into their workflows.

Discover the RESTful technologies, including REST, JSON, XML, JAX-RS web services, SOAP and more, for building today's Java-based microservices, big data applications, and web service applications using the Micronaut framework. This book is based on a course the Oracle-based author is teaching for UC Santa Cruz Silicon Valley which covers architecture, design best practices and coding labs. Pro RESTful APIs with Micronaut (Second Edition) gives you all the fundamentals from the top down: from the top (architecture) through the middle (design) to the bottom (coding). This book is a must have for any microservices or web services application programmer or developer building applications and services for today's enterprises. After reading and using this book, you'll be competent in using Micronaut and RESTful APIs for building today's microservices. Source code for the examples and case studies are free and available on Apress' GitHub page for this book. What You'll Learn Discover the key RESTful APIs, including REST, JSON, XML, JAX, SOAP and more Explore the Micronaut framework Use these for microservices for today's modern web services and data exchanges Harness Java, XML, JSON, REST, and JAX-RS in examples and case studies Apply best practices to your solutions' architecture and more

Sharpen your Java skills and boost your potential as an IT specialist. This book introduces you to the basic Java features and APIs needed to prepare for a career in programming and development. You’ll first receive an introduction to Java and then explore language features ranging from comments though exception/error handling, focusing mainly on language syntax and a few select syntax-related APIs. This constitutes the heart of the book, and you’ll use these building blocks to construct simple Java programs, and learn where Java’s implementations of expressions (and operators), and statements diverge from other languages. The final few chapters tour some additional APIs such as the Math class, related types, String and StringBuffer, and System. Along the way you’ll discover some interesting programs, such as Graph (a sine/cosine wave-plotting application) and WC (a word-counting application). Two appendixes provide quick references to Java’s supported reserved words, and to Java’s supported operators. Equipped with this knowledge, Learn Java Fundamentals will provide you the pathway to explore additional APIs on your own, and increase your Java awareness. What You’ll Learn Understand the basics of Java applications and APIs Study language features such as comments, identifiers, variables, types, and literals. Explore operators, expressions, statements, and other key features such as classes, objects, class extension, and class abstraction. Who This Book Is For Developers, programmers, and students with little or no Java experience

Master enterprise-grade application and microservice development with Pro Spring Boot 4. This revised edition empowers you to fully harness the groundbreaking capabilities of Spring Boot 4, crafting robust and scalable web, cloud, and microservice solutions with unparalleled ease. Dive deep into the latest advancements, including enhanced support for Java 17 and 21, significant updates to Spring Security, refined Spring Boot Actuator metrics with Micrometer, and expanded GraalVM integration for native compilation. Explore cutting-edge features like RSocket service interfaces, enriched Spring Data JDBC flexibility, and the revolutionary AOT (Ahead-of-Time Transformation) for optimized performance. Authored by seasoned experts, including a Developer Advocate on the Spring Team at Broadcom, and a Senior Staff Engineer and Instructor at CockroachLabs, this book delivers an authoritative, pragmatic guide filled with real-world case studies of increasing complexity. Gain invaluable insights, best practices, and first-hand knowledge directly from experts shaping the future of Spring Boot technology. What You Will Learn Construct sophisticated web, cloud, microservices, and enterprise applications with the Spring Boot 4 framework. Achieve seamless persistence with JDBC, JPA, a wide array of NoSQL databases, and Distributed SQL with CockroachDB. Implement advanced messaging solutions with JMS, RabbitMQ, WebSockets, and RSocket. Leverage Spring AI to develop AI applications and agents. Connect to LLMs or other MCP Servers and utilize the appropriate tools to automate tasks. Navigate the Spring Cloud ecosystem and extend Spring Boot with custom Starters and @Enable features. Apply best practices for testing and deploying Spring Boot applications with confidence. Leverage the power of AOT (Ahead-Of-Time Transformations) and GraalVM for native compilation. Master the latest version of Spring Security for robust application protection Who This Book Is for: Experienced Spring and Java developers eager to significantly boost productivity, reduce complexity, and accelerate development cycles for their enterprise applications and software services.

Build enhanced visual experiences and design and deploy modern, easy-to-maintain, client applications across a variety of platforms. This book will show you how these applications can take advantage of JavaFX’s latest user interface components, 3D technology, and cloud services to create immersive visualizations and allow high-value data manipulation. This book is a professional reference for building Java applications for desktop, mobile, and embedded in the Cloud age. It offers end-to-end coverage of the latest features in JavaFX 21 and 23. This third edition has been updated to include new features introduced in JavaFX 21 and 23, including NEW APIs: Map, FlatMap, and OrElse fluent bindings for ObservableValue, along with the new Subscription API. Additionally, it's updated to account for new bug fixes and overall improvements to existing functionality in Java. After reading this book, you will be equipped to upgrade legacy client applications, develop cross-platform applications in Java, and build enhanced desktop and mobile native clients. What You Will Learn Create modern client applications in Java using the latest JavaFX 21 and 23 Build enterprise clients that will enable integration with existing cloud services Use advanced visualization and 3D features Deploy on desktop, mobile, and embedded devices Who This Book Is For Professional Java developers who are interested in learning the latest client Java development techniques to fill out their skills set

Enhance your programming toolkit and build robust applications by mastering Kotlin. This book connects Java and Kotlin through side-by-side code samples and practical demonstrations. Java programmers and up-and-coming developers seeking to learn Kotlin need to do so with confidence. Starting with the fundamentals of basic syntax, this book will cover data types, variables, control flow statements. From there move on to advanced topics like object-oriented programming concepts with null safety, lambdas, functions, inheritance and coroutines. Additionally, you’ll delve into practical applications such as designing custom domain-specific languages, working with Kotlin Multiplatform, and leveraging reactive extensions. With numerous hands-on exercises and real-world examples, you'll gain the expertise needed to explore advanced projects. What You Will Learn Explore object-oriented and functional programming with Kotlin to create modular code. Review Kotlin’s techniques for error handling and exception management. Implement Kotlin coroutines for efficient concurrency and asynchronous task management. Design custom domain-specific languages and use the Kotlin standard library for string manipulation and file handling. Who This Book is For: Java developers and programmers looking to master Kotlin.

Learn the principles of good software design and then turn those principles into great code. This book introduces you to software engineering — from the application of engineering principles to the development of software. You'll see how to run a software development project, examine the different phases of a project, and learn how to design and implement programs that solve specific problems. This book is also about code construction — how to write great programs and make them work. This new third edition is revamped to reflect significant changes in the software development landscape with updated design and coding examples and figures. Extreme programming takes a backseat, making way for expanded coverage of the most crucial agile methodologies today: Scrum, Lean Software Development, Kanban, and Dark Scrum. Agile principles are revised to explore further functionalities of requirement gathering. The authors venture beyond imperative and object-oriented languages, exploring the realm of scripting languages in an expanded chapter on Code Construction. The Project Management Essentials chapter has been revamped and expanded to incorporate "SoftAware Development” to discuss the crucial interpersonal nature of joint software creation. Whether you're new to programming or have written hundreds of applications, in this book you'll re-examine what you already do, and you'll investigate ways to improve. Using the Java language, you'll look deeply into coding standards, debugging, unit testing, modularity, and other characteristics of good programs. You Will Learn Modern agile methodologies How to work on and with development teams How to leverage the capabilities of modern computer systems with parallel programming How to work with design patterns to exploit application development best practices How to use modern tools for development, collaboration, and source code controls Who This Book Is For Early career software developers, or upper-level students in software engineering courses

Embark on a transformative journey into the nuances of API design and implementation. This comprehensive guide will equip you with the prowess to craft APIs that exemplify excellence, optimize performance, fortify security, and elevate user experience. From grasping the core tenets of REST architecture to navigating diverse frameworks like Node.js with Express, Ruby on Rails, Django, Laravel with PHP, ASP.NET Core with C#, and Spring Boot with Java, this compendium empowers you to create APIs that set new industry benchmarks. In-depth tutorials will empower you to master data serialization, robust authentication protocols, and impervious security measures. This book also delves into the more advanced topics encompassing API governance, meticulous versioning strategies, cross-origin resource sharing (CORS) considerations, real-time capabilities, and microservices communication intricacies. You'll gain insights into vigilant monitoring, astute analytics, and optimization techniques that truly differentiate your APIs. Moreover, this book navigates the ever-evolving legal and privacy landscape confidently, ensuring compliance and upholding user trust, and provides the expertise needed to craft more efficient APIs that stand at the forefront of modern digital innovation. Presenting real-world case studies, comprehensive explanations, and practical illustrations, Mastering REST APIs is your compass to navigate the complex world of web development. .

Discover how to become a more efficient Java developer using Docker. This book will help you streamline your development process, boost portability, and enhance the efficiency of your applications. Docker has transformed the landscape of application and deployment by simplifying the creation and management of development environments, saving valuable time and reducing compatibility issues. With this book, you will learn how to package Java applications into Docker containers, making them consistent and portable across different environments. As a result, you’ll gain the expertise to efficiently scale and manage your applications, ensuring they run smoothly in production to boost development efficiency. This book sets itself apart through its emphasis on Java developers’ specific needs and challenges, providing relevant examples and use cases. The hands-on practical approach provides you with the necessary skills to be a more valuable Java developer. What You Will Learn Understand the fundamental concepts of Docker and containerization Package Java applications into Docker containers Gain hands-on experience in Dockerizing Java applications Efficiently test, debug, deploy, and scale Java applications using Docker Acquire skills that will make you a more valuable and efficient Java developer Who This Book Is For Java developers who want to make their applications more portable and easier to manage

Get an in-depth introduction to the Go programming language and its associated standard runtime libraries. This book is targeted towards programmers that already know the Java programming language and uses that Java knowledge to direct the learning of Go. You will get a deep understanding of the Go language and obtain a good introduction to the extensive Go standard libraries. This book teaches Go through clear descriptions of Go features, contrasting them with similar Java features and via providing extensive code examples. After reading this book you will be knowledgeable enough about Go and its libraries to begin doing effective programming using the Go language. Go for Java Programmers is structured more like a tutorial than a reference document. It covers key features of Go, but not every little detail as a reference might. Its goal is to get you competent enough in Go and its runtime that you can begin to effectively write Go programs. You will: Discover how the Go and Java languages and development experience compare and contrast Examine the key Go Runtime libraries and how they compare to Java libraries See when it is appropriate to use the Go language instead of the Java language Read and understand programs written in Go Write many programs in Go Determine when Go is an appropriate language to develop applications in.

Learn how to write Java code faster by using the Vector API for SIMD operations. This book shows you how to apply data-level parallelism to common algorithms without leaving the Java ecosystem, making modern CPU capabilities accessible to everyday developers. The book uses a problem-first approach. Each chapter starts with a familiar coding task—such as array summation or prefix sums—and then reworks the solution using vectorization. You’ll move from simple element-wise operations to advanced techniques like parallel scans, bitonic sorting, and sliding window optimizations. Extensive code examples, performance benchmarks, diagrams, and assembly analysis ensure you understand both the “how” and the “why” behind every optimization. Today, the rise of computer-heavy applications in finance, scientific computing, machine learning and real-time analytics makes understanding vectorization an essential skill for developers. Modern processors dedicate significant silicon to vector units, yet most Java code never uses them. By mastering the Vector API, you’ll learn to recognize patterns that benefit from SIMD, write production-ready vector algorithms, and make informed architectural decisions. This is your guide to writing faster, smarter Java code that fully leverages today’s hardware. What You Will Learn: !-- [if !supportLists]--Master Java Vector API and SIMD across x86 and ARM architectures Build vector-length-agnostic algorithms for any hardware platform Spot patterns for vectorization and use masked ops for conditional logic Optimize vertical vs. horizontal ops and avoid instruction-level hazards Ensure numerical stability and verify vectorization via assembly analysis Who This Book is for: Intermediate to advanced Java developers who are familiar with core language features, OOP, arrays, loops, and basic algorithms and are comfortable with Big-O notation and concurrency concepts; multi-threading knowledge helpful but not required. No prior SIMD or low-level optimization experience needed.