Migrating Java 11 to Java 17 | Java 17 New Features and Skills (TT2135)

Course Objectives

Learning Objectives

Working in an interactive learning environment, led by our expert facilitator, you’ll explore:

• Mastering Records in Java 17: Gain a thorough understanding of how to utilize Records in Java 17 for efficient data handling, enabling you to simplify data modeling and ensure more concise and readable code.
• Advanced String and Text Block Management: Develop the ability to effectively use the new String and Text Block features in Java 17. This includes mastering methods like strip(), isBlank(), and repeat(), as well as understanding the nuances of indentation in text blocks for improved text manipulation.
• Implementing Sealed Classes and Interfaces: Acquire the skills to implement sealed classes and interfaces in Java 17, enhancing your ability to create more secure, type-safe, and maintainable code.
• Utilizing Enhanced Switch Expressions and Pattern Matching: Learn to effectively use enhanced switch expressions and pattern matching for instanceof in Java 17. This skill is crucial for writing more concise and error-resistant code.
• Efficient Exception Handling Techniques: Master the enhanced exception handling features in Java 17, such as the improved try-with-resources statement and more informative NullPointerExceptions, to write more robust and reliable Java applications.
• Applying Modern Java Development Techniques: Develop the ability to apply these new Java 17 features in real-world scenarios. This includes integrating these skills into existing projects, enhancing your capacity to upgrade and modernize Java applications efficiently.
• Specific Java 17 features that are covered in the course including: Switch Expressions; Text blocks; Pattern matching for instanceof; Introducing records as carrier of immutable data
• Specific Java 21 features that are covered in the course including: Sequenced Collections; Pattern matching in Switch statements; Record Patterns

Need different skills or topics?  If your team requires different topics or tools, additional skills or custom approach, this course may be further adjusted to accommodate.  Our team will collaborate with you to understand your needs and will target the course to focus on your specific learning objectives and goals.

Course Prerequisites

Audience & Pre-Requisites

This is an intermediate- level Java programming course, designed for experienced Java 11 developers who wish to get up and running with Java 17 immediately.  Attendees should have a working knowledge of developing Java 11 applications. This course is not for non-developers, or developers new to Java.

Course Agenda

1. Versions and Features

• Quick refresh of Java versions since Java 8
• (Non) LTS releases
• Preview features
• Java Language Specifications
• Java Specification Requests
• Java Enhancement Proposals
• Tutorial: IntelliJ Community Edition 2023 QuickStart (Using Maven) (Eclipse also available – please inquire)

2. Records

• Data objects in Java
• Introduce records as carrier of immutable data
• Defining records
• The Canonical constructor
• Compact constructors
• Lab: Records

3. String and Text Blocks

• Discuss the definition of whitespace in Java
• Introduce the strip() methods of the String class
• The isBlank() and repeat() methods introduced in Java 11
• Using the lines() method to construct a Stream instance using a String
• Compact strings
• Introducing Text Blocks
• Indentation in text blocks
• Lab: Text Blocks

4. Sealed Classes

• Introduce sealed classes
• The sealed and permits modifier
• Sealed interfaces
• Sealed classes and pattern matching
• Lab: Sealed Classes

5. Switch Expressions

• Switch Expressions
• Using yield
• Discuss switch fall through
• Lab: Switch Expressions

6. Pattern Matching for instanceof

• Pattern Matching for instanceof
• Scope of variable when using pattern matching
• Refining Patterns in switch
• Dominance of pattern labels
• Lab: Pattern Matching

7. Exception Handling

• Enhanced try-with-resources
• Helpful NullpointerExceptions
• Excluding parameter names in error messages
• Lab: Helpful Nullpointers

8. More Updates

• Private methods in interfaces
• The forRemoval and since attributes of the Deprecated annotation
• Multi-release JAR files
• Javadoc updates
• Class-Data Sharing
• Application Class-Data
• CompactNumberFormat
• Lab: Creating a Multi-Release Jar file

Course Materials

Setup Made Simple! Learning Experience Platform (LXP)

All applicable course software, digital courseware files or course notes, labs, data sets and solutions, live coaching support channels, CodeCoach.AI anytime tutor access, and rich extended learning and post training resources are provided for you in our “easy access, single source, no install required” online Learning Experience Platform (LXP), remote lab and content environment. Access periods vary by course. We’ll collaborate with you to ensure your team is set up and ready to go well in advance of the class. Please inquire about set up details and options for your specific course of interest.