← Exit to Module 7: Advanced Object-Oriented Concepts lessons
Module progress · 0%Lesson · 14 min
Module 7: Advanced Object-Oriented Concepts
Lesson focusDefault & Static Interface Methods
Add behavior to existing interfaces without breaking clients by leveraging default and static utilities.
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
Default methods provide backward-compatible enhancements. Keep them concise and delegate to other APIs to avoid bloated interfaces.
Static interface methods group helper logic with the capability they support, similar to companion objects.
Document whether overriding is expected or optional to reduce surprises for implementers.