update(String desc), method is called by the subject on the observer in order to notify it, when there is a change in the state of the subject.Java Design Patterns subscribe(), method is used to ...

let’s see how you can implement the Observer pattern in your own code. This section extends an example from a previous Java Design Patterns column, “Take Control with the Proxy Design Pattern.” ...

This book enables you to upskill by understanding popular patterns to evolve into a proficient software developer. You’ll start by exploring the Java platform to understand and implement design ...