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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
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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

Overview of the Java Stack


Before we dive into the stack walker, let's start by covering the Java Stack. This is basic stack information, not specific to the stack walker.

The Java runtime has a class named Stack, which can be used to store objects using the last-in-first-out (LIFO) policy.

When arithmetic expressions are calculated they are done using a stack. If we add A and B in our code first A is pushed on the Operand Stack, then B is pushed on the Operand Stack and finally the addition operation is executed, which fetches the two topmost elements of the Operand Stack and pushes the result, A + B there.

The JVM is written in C and executes calling C functions and returning from there. This call-return sequence is maintained using the Native Method Stack just like any other C program.

Finally, when the JVM creates a new thread it also allocates a call stack containing frames that in turn contain the local variables, reference to the previous frame, and reference to the class that contains...

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