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

Multi-resolution Images


The purpose of Java Enhancement Proposal 251 was to create a new API that supports multi-resolution images. Specifically, to allow a multi-resolution image to encapsulate several resolution variants of the same image. This new API will be located in the java.awt.image package. The following diagram shows how multi-resolution can encapsulate a set of images, with different resolutions, into a single image:

This new API will give developers the ability to retrieve all image variants or retrieve a resolution-specific image. This is a powerful set of capabilities. The java.awt.Graphics class will be used to retrieve the desired variant from the multi-resolution image.

Here is a quick look at the API:

    package java.awt.image;

    public interface MultiResolutionImage  
    {
      Image getResolutionVariant(float destinationImageWidth,
       float destinationImageHeight);

      public List <Image> getResolutionVariants();
    }

As you can see in the preceding code...