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Transitioning to Java

You're reading from   Transitioning to Java Kickstart your polyglot programming journey by getting a clear understanding of Java

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Product type Paperback
Published in Apr 2023
Publisher Packt
ISBN-13 9781804614013
Length 354 pages
Edition 1st Edition
Languages
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Author (1):
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Ken Fogel Ken Fogel
Author Profile Icon Ken Fogel
Ken Fogel
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Toc

Table of Contents (23) Chapters Close

Preface 1. Part 1:The Java Development Environment
2. Chapter 1: Understanding Java Distributions FREE CHAPTER 3. Chapter 2: Code, Compile, and Execute 4. Chapter 3: The Maven Build Tool 5. Part 2:Language Fundamentals
6. Chapter 4: Language Fundamentals – Data Types and Variables 7. Chapter 5: Language Fundamentals – Classes 8. Chapter 6: Methods, Interfaces, Records, and Their Relationships 9. Chapter 7: Java Syntax and Exceptions 10. Chapter 8: Arrays, Collections, Generics, Functions, and Streams 11. Chapter 9: Using Threads in Java 12. Chapter 10: Implementing Software Design Principles and Patterns in Java 13. Chapter 11: Documentation and Logging 14. Chapter 12: BigDecimal and Unit Testing 15. Part 3:GUI and Web Coding in Java
16. Chapter 13: Desktop Graphical User Interface Coding with Swing and JavaFX 17. Chapter 14: Server-Side Coding with Jakarta 18. Chapter 15: Jakarta Faces Application 19. Part 4:Packaging Java Code
20. Chapter 16: Deploying Java in Standalone Packages and Containers 21. Index 22. Other Books You May Enjoy

Creating an object managed by Context Dependency Injection and validated with Bean Validation

Only two Java classes are used in this program, and they are nearly identical to what we used in Chapter 13, Desktop Graphical User Interface Coding with Swing and JavaFX. They are both subject to CDI, and the data class also uses BV. Rather than show the entire code for these beans we saw in Chapter 13, we will only look at what needs to be changed.

FinanceBean

The first annotation, @Named, defines this class as under the control of CDI. Before CDI was widely used, JSF had its own CDI-like implementation that used the @ManagedBean annotation. This is considered obsolete and should no longer be used. The name in the parenthesis, money, is an alias we can use in the expression language:

@Named("money")

Scopes

When an object managed by CDI in a Jakarta application is created or destroyed, and other classes may access it, it is referred to as the Scope. There are the...

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