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
Taking Notes with Monumentum

DRBG-based SecureRandom implementations

Prior to Java 9, the JDK had two approaches to generating secure random numbers. One method, written in Java, used SHA1-based random number generation and was not terribly strong. The other method was platform-dependent and used preconfigured libraries.

Deterministic Random Bit Generator (DRBG) is a method for generating random numbers. It has been approved by the National Institute of Standards and Technology (NIST), a branch of the U.S. Department of Commerce. DRBG methodologies include modern and stronger algorithms for generating secure random numbers.

Java Enhancement Proposal 273, DRBG-Based SecureRandom Implementations aimed to implement three specific DRBG mechanisms. These mechanisms are listed as follows:

  • Hash_DRBG


You can learn specifics about each of the DRBG mechanisms at

Here are the three new APIs:

  • SecureRandom: New methods allowing the configuration...