Java Sealed Classes and Modern Inheritance Control

When designing object-oriented systems in Java, open-ended inheritance can lead to unpredictable behaviors and security vulnerabilities. This text-based course introduces you to modern Java inheritance control, showing you how to explicitly define which classes can extend or implement your code. You will transition from standard inheritance models to precise, compiler-enforced class hierarchies that make your software robust and maintainable. * Understand the core concepts of restricted inheritance and why modern Java introduces sealed types. * Configure sealed classes and interfaces using the permits keyword. * Manage subclass extension options using final, sealed, and non-sealed modifiers. * Practice combining sealed classes with modern Java pattern matching for exhaustive switch expressions. * Apply type-safety principles to prevent unauthorized class extensions in your domain models. This course begins with foundational concepts of object-oriented design and Java's classic inheritance limitations before moving step-by-step into modern syntax and real-world implementation strategies. This course is designed for Java developers who understand basic programming concepts and object-oriented fundamentals and want to adopt modern Java features. Start reading today to write cleaner, safer, and more expressive Java code.