Book Image

Java 9 Programming Blueprints

By : Jason Lee
Book Image

Java 9 Programming Blueprints

By: Jason Lee

Overview of this book

Java is a powerful language that has applications in a wide variety of fields. From playing games on your computer to performing banking transactions, Java is at the heart of everything. The book starts by unveiling the new features of Java 9 and quickly walks you through the building blocks that form the basis of writing applications. There are 10 comprehensive projects in the book that will showcase the various features of Java 9. 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 a few. The book covers various libraries and frameworks in these projects, and also introduces a few more frameworks that complement and extend the Java SDK. Through the course of building applications, this book will not only help you get to grips with the various features of Java 9, but will also teach you how to design and prototype professional-grade applications with performance and security considerations.
Table of Contents (19 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
9
Taking Notes with Monumentum

Performing Actions


We'll look at PhotoViewerTopComponent in a moment, but there are a few more items we need to look at before moving on to that.

PhotoNode overrides two additional methods, which are as follows:

    @Override 
    public Action[] getActions(boolean context) { 
      return new Action[]{SystemAction.get(OpenAction.class)}; 
    } 
 
    @Override 
    public Action getPreferredAction() { 
      return SystemAction.get(OpenAction.class); 
    } 

Unsurprisingly, the getActions() method returns an array of Actions for this Node. Actions are an abstraction (from Swing, not NetBeans) that allow us to add items to menus, and provide a means for a user to interact with the system. Each entry you see in the main menu or a context menu is backed by an Action. In our case, we're associating the NetBeans-defined OpenAction with our node, which will, when clicked, look for an OpenCookie instance in the Node's lookup and call OpenCookie.open(), which we defined previously.

We also override...