Static constructs are a powerful way in Java to go beyond simple object-oriented programming solutions and enhance our programs with more flexible implementations to meet our needs.
final is a very powerful keyword in Java that allows us to limit a class extensibility or a method to be overriden, along with many other cases that contribute to Java being a secure and robust platform.
Sealed classes are a powerful feature added to Java 17 that allows modeling our business domain data types in a very concise way and together with other features allows us to build more secure and robust software.
Abstract classes represent a powerful tool at our disposal when following the OOP paradigm. Properly implemented, they enhance our code and make it more robust, secure, and maintainable.
Interfaces in Java define behaviors, which are expressed as a group of methods in their bodies. They establish a well-defined API contract between two parties and promote loose coupling.
Java classes and objects are cornerstones of the Object-Oriented Programming (OOP) model that allows us to represent real-world concept and entities in our programs.