The Observer pattern is probably one of the best ways to reduce coupling between objects. For example, if you are writing a typical application, you may decide to provide a factory or manager that ...

The Observable design pattern is used in many important Java APIs. One well-known example is a JButton that uses the ActionListener API to execute an action. In this example, we have an ...

Wiring The Observer Pattern with Spring. To illustrate the Observer Pattern concretely, I chose to create a Town Crier class that sends messages to any registered Town Resident class. To keep this ...