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

Product type Course

Published in Apr 2018

Publisher Packt

ISBN-13 9781788832823

Length 910 pages

Edition 1st Edition

Languages

Java

Tools

HTTP

Concepts

Application Development

Authors (3):

Dr. Edward Lavieri Jr.

Jason Lee

Peter Verhas

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Table of Contents (33) Chapters

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

What is JShell?

JShell is a new tool introduced with Java 9. It is an interactive read-eval-print loop tool that is used to evaluate the following Java programming language components--declarations, statements, and expressions. It has its own API so that it can be used by external applications.

Note

Read-Eval-Print Loop is often referred to as REPL, taking the first letter from each word in the phrase. It is also knows language shell or interactive top-level.

The introduction of JShell was a result of Java Enhancement Program (JEP) 222. Here are the stated goals of this JEP in regards to the Java Shell command-line tool:

Facilitate rapid investigation
Facilitate rapid coding
Provide an edit history

The rapid investigation and coding listed previously includes statements and expressions. Impressively, these statements and expressions do not need to be part of a method. Furthermore, variables and methods are not required to be part of a class, making this tool especially dynamic.

In addition, the...

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Table of Contents (33) Chapters

What is JShell?

Note

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Authors (3)

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