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Java 9: Building Robust Modular Applications

You're reading from   Java 9: Building Robust Modular Applications Master advanced Java features and implement them to build amazing projects

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Product type Course
Published in Apr 2018
Publisher Packt
ISBN-13 9781788832823
Length 910 pages
Edition 1st Edition
Languages
Tools
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Authors (3):
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Dr. Edward Lavieri Jr. Dr. Edward Lavieri Jr.
Author Profile Icon Dr. Edward Lavieri Jr.
Dr. Edward Lavieri Jr.
Jason Lee Jason Lee
Author Profile Icon Jason Lee
Jason Lee
Peter Verhas Peter Verhas
Author Profile Icon Peter Verhas
Peter Verhas
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Toc

Table of Contents (33) Chapters Close

Title Page - Courses
Packt Upsell - Courses
Preface
1. The Java 9 Landscape FREE CHAPTER 2. Discovering Java 9 3. Java 9 Language Enhancements 4. Building Modular Applications with Java 9 5. Migrating Applications to Java 9 6. Experimenting with the Java Shell 7. Leveraging the New Default G1 Garbage Collector 8. Microbenchmarking Applications with JMH 9. Making Use of the ProcessHandle API 10. Fine-Grained Stack Tracing 11. New Tools and Tool Enhancements 12. Concurrency and Reactive Programming 13. Security Enhancements 14. Command Line Flags 15. Best Practices In Java 9 16. Future Directions 17. Introduction 18. Managing Processes in Java 19. Duplicate File Finder 20. Date Calculator 21. Sunago - A Social Media Aggregator 22. Sunago - An Android Port 23. Email and Spam Management with MailFilter 24. Photo Management with PhotoBeans 25. Taking Notes with Monumentum 26. Serverless Java 27. DeskDroid - A Desktop Client for Your Android Phone 28. What is Next? 1. Bibliography
Index

Java-level JVM compiler interface [JEP-243]


The JEP-243 was to create a Java-based JVM Compiler Interface (JVMCI). The JVMCI enables a Java compiler (which must have been written in Java) to be used as a dynamic compiler by the JVM.

The reasoning behind the desire for the JVMCI is that it would be a highly optimized compiler that does not require low-level language features. Some JVM subsystems require low-level functionality, such as with garbage collection and bytemode interpretation. So, the JVMCI was written in Java instead of C or C++. This provides the collateral benefit of some of Java's greatest features, such as the following ones:

  • Exception handling
  • IDEs that are both free and robust
  • Memory management
  • Runtime extensibility
  • Synchronization
  • Unit testing support

As JVMCI was written in Java, it will arguably be easier to maintain.

There are three primary components of the JVMCI API:

  • Virtual machine data structure access
  • Installing compiled code with its metadata
  • Using the JVM's compilation system...
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