Interfaces Interfaces define a contract
{"Image DocumentName": "Interfaces Interfaces define a contract", "Image ImageDescription": "Contain methods and their signatures. Can also include static final constants (and comments) But no implementation. Very similar to abstract classes. One interface can extend another, but. An interface cannot extend a class. A class cannot extend an interface. Classes implement an interface.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}