The relationship between JAVA classes and interfaces __java

Classes and interfaces, inheritance, and implementation relationships are summarized as follows:

Interface inheritance interface (multiple interfaces can be inherited)

Interfaces cannot inherit, implement classes

class implements interfaces (multiple interfaces can be implemented)

Class Inheriting classes (you cannot inherit multiple classes)

Because the method body cannot be defined in an interface, the interface cannot inherit (but not implement) the class. Although jdk1.8 can have method entities in an interface, interfaces still cannot inherit classes.