← Exit to Module 7: Advanced Object-Oriented Concepts lessons
Module progress · 0%Lesson · 12 min
Module 7: Advanced Object-Oriented Concepts
Lesson focusMarker Interfaces & Metadata Alternatives
Understand historical marker interfaces and modern annotation-based replacements.
01 · 25 minDesigning Robust Inheritance HierarchiesLocked02 · 20 minMethod Overriding Rules & ContractsLocked03 · 15 minDeep Dive: The super KeywordLocked04 · 22 minAbstract Classes vs InterfacesLocked05 · 18 minMultiple Inheritance Through InterfacesLocked06 · 14 minDefault & Static Interface MethodsLocked07 · 12 minMarker Interfaces & Metadata AlternativesLocked08 · 20 minAdvanced Polymorphism PatternsLocked09 · 16 minCasting, instanceof, and Pattern MatchingLocked10 · 15 minComposition vs InheritanceLocked11 · 30 minMini-Project: Shape HierarchyLocked
Marker interfaces like Serializable and Cloneable historically signaled runtime behavior via instanceof checks.
Annotations or explicit configuration often provide clearer metadata while avoiding type hierarchy pollution.
When maintaining legacy systems, document marker semantics so new developers know what behaviors they trigger.