Modern Java Through Coding Problems

Automated code generation is rising, but the need for skilled software engineers is more critical than ever. Engineers must still understand, design, debug, and guide the systems they build. Modern Java continues to be one of the most reliable and widely used languages, capable of powering everything from small applications to large-scale enterprise systems.

This book follows a structured, step-by-step path and uses real-world scenarios to explain concepts beyond syntax. It begins with Java fundamentals, including IDE setup, versions, debugging, and object-oriented programming. It also explores building blocks such as exception handling, collections, and file management before moving to practical development. The book guides you through building CRUD applications from CLIs to GUIs. It also covers database operations using JDBC and ORM tools, automation tasks such as scheduling email processing, web scraping, API integration, and AI/ML services. It further introduces multithreading and building scalable applications using Spring Boot and Quarkus, followed by deployment.

By the end of this book, you will gain the skills and confidence to design and build real-world Java applications. You will also develop practical experience in automation, secure coding, API integration, deployment strategies, and modern DevOps practices.

WHAT YOU WILL LEARN
● Java fundamentals through real-world scenarios.
● Design object-oriented applications using modern Java.
● Build CRUD applications transitioning from CLI to GUI.
● Automate workflows, including reporting, scheduling, and email.
● Integrate APIs, web scraping, and AI/ML services.
● Develop scalable applications using Spring Boot and Quarkus.
● Deploy production-ready Java applications.

WHO THIS BOOK IS FOR
This book is ideal for software developers, manual and automation testers, technical leads, architects, and DevOps engineers. It is also valuable for delivery managers, scrum masters, and project managers who want to better understand modern Java applications and the end-to-end development lifecycle.

1. Java Fundamentals for Real-world Development
2. Real-world Application Development with Java OOP
3. Exception Handling and Debugging
4. Implementing Data Structures Using Java Collections
5. Handling Files, Data, and Date-time
6. Database Connectivity with JDBC, NoSQL, ORM, and Cloud
7. Build and Test CRUD Applications CLI to GUI
8. Task Automation with Scheduling, File, Email, and Reporting
9. Web Scraping, API Integration, and AI
10. Multithreading and Concurrency
11. Advanced Java Concepts
12. Deploying Java Application

Gaurav Agarwal is a seasoned technology leader with over 22 years of experience architecting and delivering large-scale enterprise platforms. Currently serving as a technical delivery director at S&P Global, he leads the development of mission-critical data platforms used by global investment banks. Throughout his career at institutions like NatWest and Fiserv, Gaurav has spearheaded major initiatives in cloud migration, microservices, and DevOps automation.

He holds an M.Tech in computer science and an MBA in finance, and has completed an advanced specialization in AI/ML from IIT Ropar. His deep technical expertise spans the entire Java ecosystem. Driven by a passion for bridging the gap between theory and industry practice, Gaurav wrote this book to empower the next generation of developers with practical, problem-solving skills.