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Building modern applications with Java KEY FEATURES ● Recap your understanding of fundamental Java programming, including new features of Java 21. ● Explore how to use Java to interact with relational and NoSQL databases. ● Learn how to build full-stack web applications with Java. DESCRIPTION Code with Java 21 is a practical journey through one of the world’s most prolific computer programming languages. It is meant to help readers build up their knowledge of common Java programming constructs, data structures, and engineering paradigms. Filled with real-world examples, this book aims to build the reader’s understanding of building software applications with Java. Seasoned Java developers should buckle in as this book takes a hands-on approach to leveraging popular Java frameworks like Spring and Vaadin to build rich, feature-filled web applications. It also covers building powerful data-driven applications on enterprise-grade databases like PostgreSQL and Apache Cassandra®. This book will also show how to use Java to animate with colorful graphics and even build a simple arcade game. Around the world, Java runs on billions of devices. After its inception nearly 30 years ago, it remains one of the most popular and sought-after programming languages. Whether you are an aspiring computer hobbyist or want to gain a valuable skill en route to a lucrative career as a software developer, Code with Java 21 should be every developer’s go-to reference for building Java applications. WHAT YOU WILL LEARN ● Learn fundamental programming structures with Java. ● Explore the new features of Java 21. ● Build Java applications with databases like PostgreSQL and Apache Cassandra®. ● Learn how to build graphics and simple animations with Java. ● Leverage frameworks like Spring Boot and Spring Data. ● Build fully-featured web GUIs with Vaadin. WHO THIS BOOK IS FOR This book is for current and aspiring software developers who wish to learn or expand their current knowledge base of the Java programming language. While the new features of Java 21 are certainly a focus, this book also shows how to build real-world applications. TABLE OF CONTENTS 1. Getting to Know Java 2. Fundamental Programming Structures 3. Strings, Characters, and Regular Expressions 4. Arrays, Collections, and Records 5. Arithmetic Operations 6. Common Data Structures 7. Working with Databases 8. Web Applications 9. Graphics in Java 10. Final Java Project Appendix A: References Appendix B: UTF Conversion Chart Appendix C: Database Command Reference Appendix D: Common HTTP Response Codes Appendix E: Common Color Codes Appendix F: Garbage Collection Cover Title Page Copyright Page Dedication Page About the Author About the Reviewer Acknowledgement Preface Table of Contents 1. Getting to Know Java Introduction Structure Objectives Why code with Java? Configuring your environment Operating System Java Runtime Environment Java Development Kit JDK vendors and editions Installation Windows MacOS Linux Version management Integrated Development Environment Java dependency management Source control Git installation Object-oriented programming Encapsulation Inheritance Abstraction Polymorphism Static polymorphism Dynamic polymorphism Advantages of OOP What is new in Java 21? Virtual threads Sequenced Collections String templates Conclusion Points to remember 2. Fundamental Programming Structures Introduction Structure Objectives Getting started Maven HelloWorld Anonymous main classes Variables and formatting Reading input Error handling If statements Switch/case statements Loops For loops While loops Do loops Files Writing to a file Reading from a file Reading row properties from a file Methods and constructors Conclusion Points to remember 3. Strings, Characters, and Regular Expressions Introduction Structure Objectives Characters ASCII art Strings substring toUpperCase toLowerCase String equality Equality of string suffixes Equality of string prefixes contains Regular expressions Conclusion Points to remember 4. Arrays, Collections, and Records Introduction Structure Objectives Arrays Multi-dimensional arrays Collections and maps Sets HashSet LinkedHashSet TreeSet ArrayList LinkedList Maps HashMap LinkedHashMap TreeMap Sequenced collections Records Building a simple example RPGSimulation class Player class Hero class RPGSimulation class continued Conclusion Points to remember 5. Arithmetic Operations Introduction Structure Objectives Integer arithmetic Addition Testing add() with JUnit Subtraction Multiplication Division Modulo Exponent Floating point arithmetic Addition Nuances with floating point arithmetic Subtraction Multiplication Division Formatting floating point values Exponent Square root Cube root Absolute value Conclusion Points to remember 6. Common Data Structures Introduction Structure Objectives Stacks Queues Linked lists Binary trees Conclusion Points to remember 7. Working with Databases Introduction Structure Introduction to databases Short history of databases CAP theorem Consistency Availability Partition tolerance CAP designations PostgreSQL ElephantSQL Schema Loading data Querying data Accessing from Java Apache Cassandra Astra DB Schema Loading data Querying data Accessing from Java Choosing the right database Conclusion Points to remember 8. Web Applications Introduction Structure Objectives Restful operations Restful URIs Simple operations Web services with Spring Boot MVC Weather application controller Hello world service endpoint Weather Application model Define a new keyspace Define a new table Generate a new token Set application properties and environment variables pom.xml redux WeatherPrimaryKey class WeatherEntity class WeatherReading class WeatherAppRepository interface Building our response JSON objects Measurement class CloudLayer class Properties class Geometry class LatestWeather class Weather application controller redux Building web user interfaces pom.xml redux Weather application view Horizontal build methods Running the weather application Conclusion Points to remember 9. Graphics in Java Introduction Structure Objectives Simple graphics with AWT and Swing SimpleDraw class MyPanel class Animation Planet class SolarSystem class DrawPlanets class Java Breakout pom.xml Ball class Brick class Paddle class KeyHandler class BreakoutPanel class BreakoutGame class Conclusion Points to remember 10. Final Java Project Introduction Structure Introducing movie application Architecture Database Database selection Create a new vector database Table design Data loader pom.xml CassandraConnection class AstraConnection class Movie class MovieDataLoader class Querying the data Creating the movie application project Images directory pom.xml application.yml Model Movie class MovieRepository interface MovieByTitle class MovieByTitleRepository interface Controller MovieAppController class Querying the service Movies by ID Movies by title Movie recommendations View MovieAppMainView class Conclusion Points to remember Appendix A: References Appendix B: UTF Conversion Chart Appendix C: Database Command Reference SELECT INSERT UPDATE DELETE CREATE TABLE CREATE INDEX Appendix D: Common HTTP Response Codes Appendix E: Common Color Codes Appendix F: Garbage Collection Index "Code with Java 21 is a practical journey through one of the world's most prolific computer programming languages. It is meant to help readers build up their knowledge of common Java programming constructs, data structures, and engineering paradigms. Filled with real-world examples, this book aims to build the reader's understanding ofbuilding software applications with Java. Seasoned Java developers should buckle in as this book takes a hands-on approach to leveraging popular Java frameworks like Spring and Vaadin to build rich, feature-filled web applications. It also covers building powerful data-driven applications on enterprise-grade databases like PostgreSQL andApache Cassandra. This book will also show how to use Java to animate wi th colorful graphics and even build a simple arcade game. Around the world, Java runs on billions of devices. After its inceptionnearly 30 years ago, it remains one of the most popular and sought-after programming languages. Whether you are an aspiring computer hobbyist or want to gain a valuable skill en route to a lucrative career as a software developer, Code with Java 21 should be every developer's go-to reference for building Java applications"-- Provided bypublisher