Migrating Java 11 to Java 21 | Java 21 New Features and Skills (TT2136)

About This Course:

There have been a lot of changes in the Java programming language since the release of Java 11 in September of 2018. Migrating Java 11 to Java 21 is a one day course that focuses on the changes that will be most noticable for Java developers who will make the transition from Java 11 to Java 21.

This course blends expert instruction and practical, hands-on experience, focusing on bridging the gap between your current Java knowledge and the latest version. Understanding that many developers are now transitioning projects from older versions of Java, this course is your key to making that shift both quickly and effectively. Throughout the course, Throughout the course, you'll dive deep into Java 21's key features, such as Records for efficient data management, enhanced text manipulation with String and Text Blocks, the introduction of Sealed Classes, and the refinements in Switch Expressions and Pattern Matching. These updates are not mere enhancements but pivotal tools that will streamline your coding practices and make your development process more efficient. The real-world labs enable you to quickly pick up useful practical skills you'll be able to apply seamlessly into your work.

Whether you're upgrading existing projects or embarking on new ones, the skills and insights gained here will empower you to use Java 21 efficiently and innovatively. This course is more than just an upgrade in your Java knowledge; it's a comprehensive enhancement of your development skills, preparing you to tackle modern challenges with renewed expertise and confidence.

Course Objectives:

• The difference between LTS and non-LTS versions 

• What are the (dis)advantages of preview features 

• To implement data objects using the new record type 

• Improve memory consumption through the use of compact Strings 

• The use of the new strip and inBlank methods of the String class 

• Define and use multi-line text blocks 

• Use switch expressions to assign value 

• Understand the concept of pattern matching 

• Apply pattern matching for instanceof 

• Use pattern matching in switch statements 

• Sealed classes and interfaces 

• Enhancements made to the try-with-resources construct 

• Review the Java modular system 

• Explore virtual Threads 

Audience:

• This is an intermediate- level Java programming course, designed for experienced Java 11 developers who wish to get up and running with Java 21 immediately. Attendees should have a working knowledge of developing Java 11 applications.

Prerequisites:

• This course is not for non-developers, or developers new to Java.