In the last 3 weeks I did a Oracle MOOC of Oracle JET. Oracle JET it's a new Oracle Tool, released on November 2015, based in Javascript. According Oracle, not is a Javascript framework else a collection of javascript libraries and technologies to build enterprise client-side applications.
Oracle JET is compose for libraries as: RequireJS, Knockout, JQuery, JQueryUI, Cordova.
Go to official Oracle JET web: http://www.oracle.com/webfolder/technetwork/jet/index.html
You can create web applications and mobile applications (or both).
Oracle JET use AltaUI Style and has a lot of components. In Oracle JET Cookbook site you can see all components, properties and you can test, it's a very useful page: http://www.oracle.com/webfolder/technetwork/jet/jetCookbook.html
As client-side (you should know something of HTML, JS and CSS) application communicate with webservices: REST and JSON, preferably Oracle Cloud Services.
The IDE for work it's Netbeans (I worked with this IDE for JAVA projects and I like). Of course you can use console to create and build application with yeoman.
The next Oracle JET MOOC it's the next 3th October. For more information and enroll: https://blogs.oracle.com/javatraining/entry/announcing_a_second_session_of
