OCP Oracle Certified Professional Java SE 11 Programmer I Study Guide

This OCP Oracle Certified Professional Java SE 11 Programmer I Study Guide: Exam 1Z0-815 and the Programmer II Study Guide: Exam 1Z0-816 were published before Oracle announced major changes to its OCP certification program and the release of the new Developer 1Z0-819 exam.

No matter the changes, rest assured both of the Programmer I and II Study Guides cover everything you need to prepare for and take Exam 1Z0-819. If you've purchased one of the Programmer Study Guides, purchase the other one and you'll be all set.

NOTE: The OCP Java SE 11 Programmer I Exam 1Z0-815 and Programmer II Exam 1Z0-816 have been retired (as of October 1, 2020), and Oracle has released a new Developer Exam 1Z0-819 to replace the previous exams. The Upgrade Exam 1Z0-817 remains the same.

The comprehensive study aide for those preparing for the new Oracle Certified Professional Java SE Programmer I Exam 1Z0-815

Used primarily in mobile and desktop application development, Java is a platform-independent, object-oriented programming language. It is the principal language used in Android application development as well as a popular language for client-side cloud applications. Oracle has updated its Java Programmer certification tracks for Oracle Certified Professional.

OCP Oracle Certified Professional Java SE 11 Programmer I Study Guide covers 100% of the exam objectives, ensuring that you are thoroughly prepared for this challenging certification exam. This comprehensive, in-depth study guide helps you develop the functional-programming knowledge required to pass the exam and earn certification. All vital topics are covered, including Java building blocks, operators and loops, String and StringBuilder, Array and ArrayList, and more. Included is access to Sybex's superior online interactive learning environment and test bank--containing self-assessment tests, chapter tests, bonus practice exam questions, electronic flashcards, and a searchable glossary of important terms. This indispensable guide:

• Clarifies complex material and strengthens your comprehension and retention of key topics

• Covers all exam objectives such as methods and encapsulation, exceptions, inheriting abstract classes and interfaces, and Java 8 Dates and Lambda Expressions

• Explains object-oriented design principles and patterns

• Helps you master the fundamentals of functional programming

• Enables you to create Java solutions applicable to real-world scenarios

There are over 9 millions developers using Java around the world, yet hiring managers face challenges filling open positions with qualified candidates. The OCP Oracle Certified Professional Java SE 11 Programmer I Study Guide will help you take the next step in your career.

Auteur

Jeanne Boyarsky, OCA/OCP 8 and OCP 11, has worked as a Java developer for a major bank for more than 17 years. She is a senior moderator at CodeRanch, and trains and mentors students of all levels, including the programming division of a FIRST robotics team.

Scott Selikoff, OCA/OCP 8 and OCP 11, has been a professional Java Enterprise developer for over 20 years. He currently operates Selikoff Solutions, LLC, which provides software consulting services to businesses in the tri-state New York City area.

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Includes interactive online learning environment and study tools:

• 2 custom practice exams
• More than 250 electronic flashcards

• Searchable key term glossary Your Complete Guide to preparing for the Java SE 11 Programmer I Exam 1Z0-815 The OCP Oracle Certified Professional Java SE 11 Programmer I Study Guide thoroughly prepares you for this challenging certification exam. Focusing on Exam 1Z0-815, this in-depth study guide helps you develop the functional-programming knowledge necessary to get certified and advance your career to the next level. Every exam objective is clearly and accurately covered to ensure that you will be fully prepared on exam day. You also get access to Sybex's superior online interactive learning environment and test bankproviding self-assessment tests, chapter quizzes, bonus practice exam questions, electronic flashcards, a searchable glossary of key terms, and more. This book can be used to successfully pass both the OCP Java SE 11 Programmer I Exam 1Z0-815 and the Java Foundations Exam 1Z0-811. Coverage of 100% of all exam objectives in this Study Guide means you'll be ready for:

• Introducing the new Java™ module system
• Developing Java applications and garbage collection
• Understanding primitives, object references, and variable scope
• Learning local type inference with the new var identifier
• Creating and applying lambda expressions
• Using Java operators, parentheses, and order of operation
• Managing data with Java collections, generics, and arrays
• Directing flow with if/then, switch, and loop mechanisms
• Defining methods, abstract and concrete classes, and interfaces
• Mastering encapsulation, class inheritance, and polymorphism

• Throwing and catching exceptions and errors 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 http://www.wiley.com/go/sybextestprep, type in your unique PIN, and instantly gain access to:

• Interactive test bank with 2 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 250 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 ABOUT THE OCP PROGRAM The??Oracle Certified Professional (OCP) credential validates a high level of knowledge and skills in a specific area of Oracle technology. IT managers often use the OCP credential to evaluate the qualifications of employees and job candidates. Visit education.oracle.com/certification for more information.

Contenu
Introduction xxi

The Assessment Test xliii

Chapter 1 Welcome to Java 1

Learning About the Java Environment 2

Major Components of Java 2

Downloading a JDK 3

Identifying Benefits of Java 4

Understanding the Java Class Structure 5

Fields and Methods 5

Comments 6

Classes vs. Files 8

Writing a main() Method 8

Creating a main() Method 9

Passing Parameters to a Java Program 10

Running a Program in One Line 12

Understanding Package Declarations and Imports 13

Wildcards 15

Redundant Imports 15

Naming Conflicts 16

Creating a New Package 18

Compiling and Running Code with Packages 19

Using an Alternate Directory 20

Compiling with JAR Files 22

Creating a JAR File 23

Running a Program in One Line with Packages 24

Ordering Elements in a Class 24

Code Formatting on the Exam 26

Summary 27

Exam Essentials 27

Review Questions 29

Chapter 2 Java Building Blocks 35

Creating Objects 36

Calling Constructors 36

Reading and Writing Member Fields 37

Executing Instance Initializer Blocks 38

Following Order of Initialization 39

Understanding Data Types 40

Using Primitive Types 40

Using Reference Types 44

Distinguishing between Primitives and Reference Types 45

Declaring Variables 46

Identifying Identifiers 46

Declaring Multiple Variables 49

Initializing Variables 50

Creating Local Variables 51

Passing Constructor and Method Parameters 52

Defining Instance and Class Variables 53

Introducing var 53

Managing Variable Scope 59

Limiting Scope 59

Nesting Scope 60

Tracing Scope 60

Applying Scope to Classes 61

Reviewing Scope 62

Destroying Objects 62

Understanding Garbage Collection 63

Tracing El…