Modern Java

Learn Java the way professionals use it: modern, practical, and job-ready.

Modern Java: The Ultimate Guide, Volume 1 teaches Java 25 from the very first line of code to confident object-oriented design. Every concept follows the same clear path: what it is, why you need it, where to write the code, what happens when you run it, and how it's used in real applications.
You'll build BookNest, a realistic online bookstore, step by step: from a welcome banner to a catalog, cart, membership discounts, payment methods, and search. Every code listing in the book was compiled and run on Java 25, and the output you see is the real output.
**What you will learn:**
- Java fundamentals: variables, strings, decisions, loops, methods, and arrays
- Object-oriented Java: classes, encapsulation, records, enums, inheritance, polymorphism, and interfaces
- Modern features: sealed types, pattern matching, switch expressions, text blocks, and Java 25's newest additions
- Lambdas, functional interfaces, streams, and `Optional`
- Exceptions, generics, collections, and the modern date and time API
- Correct money handling with `BigDecimal`, and the classic bugs that trip up beginners
Every chapter includes: complete code with file paths, real output, diagrams, common mistakes, debugging guidance, best practices, exercises at three levels, and interview questions with concise answers.
Perfect for: complete beginners, computer science students, placement and interview candidates, and developers moving to Java or upgrading from older versions.

Continue your journey with Volume 2: Professional Java.