Skip to Content
Java 9: Building Robust Modular Applications
book

Java 9: Building Robust Modular Applications

by Dr. Edward Lavieri, Peter Verhas, Jason Lee
April 2018
Intermediate to advanced content levelIntermediate to advanced
910 pages
33h 21m
English
Packt Publishing
Content preview from Java 9: Building Robust Modular Applications

Default methods

Before turning our attention to Java 9, let's take a look at one more significant language feature: default methods. Since the beginning of Java, an interface was used to define how a class looks, implying a certain type of behavior, but was unable to implement that behavior. This made polymorphism much simpler in a lot of cases, as any number of classes could implement a given interface, and the consuming code treats them as that interface, rather than whatever concrete class they actually are.

One of the problems that have confronted API developers over the years, though, was how to evolve an API and its interfaces without breaking existing code. For example, take the ActionSource interface from the JavaServer Faces 1.1 ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Java 9 High Performance

Java 9 High Performance

Mayur Ramgir, Nick Samoylov
Distributed Computing in Java 9

Distributed Computing in Java 9

Raja Malleswara Rao Malleswara Rao Pattamsetti

Publisher Resources

ISBN: 9781788832823Supplemental ContentOtherPurchase LinkErrata Page