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Interview Questions, Answers and Tutorials

14 Interfaces

14 Interfaces

Interfaces, Core Javatestinganswers.com1 Comment
An interface is a group of related methods with empty bodies. In other words, it is a collection of abstract methods. An interface is not a class. A class implements an interface to inherit the abstract method of the interface.
The following code shows an interface Cars, that has method make() and price().
 
Cars Interface
The following steps show class Nissan which implements the Cars interface and define its abstract method make() and price().
14.1 | Create a new class in Eclipse
 
1. Create a new class in Eclipse as defined in the previous post.
2. Provide reference of Cars interface as shown in below screen.
3. Click on the Finish button.
 
Nissan Class implements Cars interface
14.2 | Created Nissan Class
 
Created Nissan class looks like below screen
 
The following code shows class Nissan which implements the Cars interface and defines its abstract method make() and price().
 
Nissan Class
The below screen is the output of the above codes.