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 ActionListener ...

Experienced Java developers are committed to continuous improvement. We always seek ways to make our code more readable, reliable and efficient. Java's evolution provides a steady stream of powerful ...

This pattern represents part-whole hierarchies of objects such that the consumers or the clients can treat the objects and also the compositions of objects in a uniform manner Design patterns are ...