New in Java 8 : Default and static methods in interfaces

Default method’s  (aka Defender methods) in interfaces are new in Java 8. They enable you to define a default implementation of a method in the interface itself.

If an interface is implemented by several classes, it’s hard to add method’s afterwards, as it will break the code and require all implementing classes to define the method as well. Adding a method to the interface, and defining a default implementation for it, will resolve this problem.

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Introduction to Websockets and JSON-P API in JEE7

Websockets (JSR 356) and the JSON-Processing API (JSR 353) are both introduced in the JEE7 specification. Together with JavaScript an HTML5, they enable web applications to deliver a richer user experience.

Websockets allow you to communicate bidirectional and full duplex over TCP, between your server and different kind of clients (browser’s, JavaFX… ). It’s basically a push technology, where, for example events or data originating from the server or a client, can be pushed to all (more...)