by Trisha Gee | Released August 2016 | ISBN: 0134653610

Two Hours of Video Instruction Overview Many Java developers today are working on applications written before the release of Java SE 8. Even after Java 8 is adopted for new features, it's likely that these legacy applications will not take full advantage of Java 8 without significant refactoring. Description In Refactoring to Modern Java LiveLessons, Java Champion Trisha Gee discusses the benefits of using Java 8 and shows how to identify code to refactor. She also demonstrates how Java 8 can improve performance and the benefits of applying Java 8 idioms. In this video training, Trisha provides hands-on techniques using a real application, Morphia, written in Java 6, to show when and how to apply the new features in Java 8 to an existing mature code base. Related Code Files: The code for this training can be found at https://github.com/mongodb/morphia. To view the code after the refactoring has been completed, see this branch: https://github.com/trishagee/morphia/tree/r2j8.About the InstructorTrisha Gee has developed Java applications for a range of industries, including finance, manufacturing, technology, open source, and nonprofit, for companies of all sizes. She has expertise in Java high-performance systems and is passionate about enabling developer productivity. Trisha blogs regularly on subjects that she thinks developers and other humans should care about. She's a leader of the Sevilla Java User Group, a key member of the London Java Community, and a Java Champion. https://twitter.com/trisha_gee https://es.linkedin.com/in/trishagee Skill Level Intermediate What You Will Learn Understand the benefits of refactoring to Java 8Determine what you need to have in place before refactoringIdentify sections of code to refactorRefactor code automatically and through developer insightMeasure performance of the code before and after refactoringWeigh the pros and cons of the changes to determine what to refactorWho Should Take This Course Java developers who are working on an existing system. From a technical point of view, this is suitable for junior and senior developers, but senior/lead developers and architects will find this talk useful to decide whether to apply these changes in their applications and to provide guidance to the rest of their teams. Course Requirements Experience with the Java Programming language.About LiveLessons Video Training LiveLessons Video Training series publishes hundreds of hands-on, expert-led video tutorials covering a wide selection of technology topics designed to teach you the skills you need to succeed. This professional and personal technology video series features world-leading author instructors published by your trusted technology brands: Addison-Wesley, Cisco Press, IBM Press, Pearson IT Certification, Prentice Hall, Sams, and Que. Topics include: IT Certification, Programming, Web Development, Mobile Development, Home and Office Technologies, Business and Management, and more. View all LiveLessons on InformIT at http://www.informit.com/livelessons. Show and hide more

1. Introduction
   • Refactoring to Modern Java: Introduction 00:01:12
2. Lesson 1: Getting Started—Why and How
   • 1.1 Why Java 8? 00:04:42
   • 1.2 Prerequisites 00:04:55
   • 1.3 Project Code 00:01:43
3. Lesson 2: Refactor Using the New Features
   • 2.1 Lambda Expressions 00:22:01
   • 2.2 Collections and the Streams API 00:28:25
   • 2.3 Getting to Grips with Optional 00:14:07
4. Lesson 3: Understanding Java 8 Performance
   • 3.1 Performance of Anonymous Inner Classes versus Lambda Expressions 00:04:45
   • 3.2 Performance of Lazy Methods 00:02:37
   • 3.3 Performance of a For Loop versus the Stream API 00:16:36
   • 3.4 Performance of Operations Performed in Serial and in Parallel 00:03:08
   • 3.5 Performance of Optional Safety versus Comparing to Null 00:03:03
5. Lesson 4: Pros and Cons
   • 4.1 Do Java 8 idioms make the code more readable? 00:03:27
   • 4.2 Do Java 8 features give better performance? 00:05:52
   • 4.3 Does Java 8 make it easier to write code? 00:03:18
   • 4.4 Can code be automatically refactored to Java 8? 00:02:46
6. Summary: Should you modernize your code?
   • Refactoring to Modern Java: Summary 00:02:00
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