OCP Oracle Certified Professional Java SE 21 Developer Study Guide

Auteur

ABOUT THE AUTHORS Jeanne Boyarsky is a Java Champion and has worked as a Java developer for a major bank for more than 22 years. She is a senior moderator at CodeRanch, and trains and mentors students of all levels. Scott Selikoff has been a professional Java Enterprise architect for almost 25 years. He currently works as a Staff Software Engineer at Google, specializing in Architecture and Cloud Services. He is a Leader of the Garden State Java User Group, helping to facilitate discussions and exchange of ideas within the community.

Texte du rabat

Succeed on the Java® SE 21 Developer certification exam on your first attempt In OCP Oracle® Certified Professional Java® SE 21 Developer Study Guide: Exam 1Z0-830, a team of expert Java developers and trainers delivers a focused and authoritative roadmap to the newly updated Java® SE 21 Developer certification exam (1Z0-830). The authors explain key concepts from the test that you can also apply to a new or existing Java development role, ensuring you obtain new skills, sharpen old ones, and discover skills you never knew you had. From writing methods that utilize pattern matching to building applications with virtual threads, you'll find everything you need to know about Java development to perform well on the test and at your day job. The book also includes complementary access to Sybex's superior online interactive learning environment and test bank, which offers hundreds of practice exam questions, electronic flashcards, and a searchable Glossary of the most important terms readers need to understand. Perfect for anyone preparing for the challenging OCP Java® SE 21 Developer exam, this book will also earn a prominent place on the desks of a junior and senior programmers who use Java on a daily basis. It's an ideal resource and quick reference to help you quickly find info you need immediately, reduce test anxiety on the certification exam, and assist you in your day-to-day work as a Java developer. You'll also get:

• Handle date, time, text, numeric, and Boolean values
• Understand and control program flow
• Utilize Java's Object-Oriented approach to programming
• Handle exceptions and errors
• Work with streams and Lambda expressions
• Package and deploy Java code

• Use the Java I/O API ABOUT THE ORACLE CERTIFIED PROFESSIONAL DEVELOPER CERTIFICATION The OCP Oracle Certified Professional Java® SE 21 Developer certification validates advanced understanding of Oracle concepts and skills as well as experience applying them in the real world. The focus is on advanced developer skills with a strong foundation in Java technology. Interactive learning environment Take your exam prep to the next level with Sybex's superior interactive online study tools. To access our learning environment, simply visit www.wiley.com/go/sybextestprep, register your book to receive your unique PIN, and instantly gain one year of FREE access after activation to:

• Interactive test bank with 3 practice exams to help you identify areas where further review is needed. Get more than 90% of the answers correct, and you're ready to take the certification exam.
• More than 500 electronic flashcards to reinforce learning and last-minute prep before the exam
• Comprehensive glossary in PDF format gives you instant access to the key terms so you are fully prepared

Contenu

Introduction xxix

Assessment Test xlix

Chapter 1 Building Blocks 1

Chapter 2 Operators 63

Chapter 3 Making Decisions 101

Chapter 4 Core APIs 165

Chapter 5 Methods 233

Chapter 6 Class Design 291

Chapter 7 Beyond Classes 359

Chapter 8 Lambdas and Functional Interfaces 439

Chapter 9 Collections and Generics 481

Chapter 10 Streams 553

Chapter 11 Exceptions and Localization 613

Chapter 12 Modules 683

Chapter 13 Concurrency 745

Chapter 14 I/o 811

Appendix Answers to Review Questions 887

Index 937