Book Image

Java 9: Building Robust Modular Applications

By : Dr. Edward Lavieri, Peter Verhas, Jason Lee
Book Image

Java 9: Building Robust Modular Applications

By: Dr. Edward Lavieri, Peter Verhas, Jason Lee

Overview of this book

Java 9 and its new features add to the richness of the language; Java is one of the languages most used by developers to build robust software applications. Java 9 comes with a special emphasis on modularity with its integration with Jigsaw. This course is your one-stop guide to mastering the language. You'll be provided with an overview and explanation of the new features introduced in Java 9 and the importance of the new APIs and enhancements. Some new features of Java 9 are ground-breaking; if you are an experienced programmer, you will be able to make your enterprise applications leaner by learning these new features. You'll be provided with practical guidance in applying your newly acquired knowledge of Java 9 and further information on future developments of the Java platform. This course will improve your productivity, making your applications faster. Next, you'll go on to implement everything you've learned by building 10 cool projects. You will learn to build an email filter that separates spam messages from all your inboxes, a social media aggregator app that will help you efficiently track various feeds, and a microservice for a client/server note application, to name just a few. By the end of this course, you will be well acquainted with Java 9 features and able to build your own applications and projects. This Learning Path contains the best content from the following two recently published Packt products: • Mastering Java 9 • Java 9 Programming Blueprints
Table of Contents (33 chapters)
Title Page - Courses
Packt Upsell - Courses
Preface
25
Taking Notes with Monumentum
Bibliography
Index

Generating run-time compiler tests automatically [JEP 233]


Java is arguably the most used programming language and resides on an increasingly diverse number of platforms. This exacerbates the problem of running targeted compiler tests in an efficient manner. The purpose of JEP 233 was to create a tool that could automate the runtime compiler tests.

The tool that was created starts by generating a random set of Java source code and/or byte code. The generated code will have three key characteristics:

  • Be syntactically correct
  • Be semantically correct
  • Use a random seed that permits reusing the same randomly-generated code

The source code that is randomly generated will be saved in the following directory:

    hotspot/test/testlibrary/jit-tester

These test cases will be stored for later re-use. They can be run from the j-treg directory or from the tool's makefile. One of the benefits of re-running saved tests is to test the stability of your system.