The access control mechanisms in Java allow us to have a more secure way of building our applications, libraries, and code in general. It's also an effective way to implement encapsulation and have more reliable code.
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.
Annotation interfaces in Java are a specialized kind of interface declared with a distinct syntax, intended to augment our code with more capabilities, mainly by means of reflection.
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.
The Java Development Kit (JDK) is a development environment for building applications and components using the Java programming language.