Java OOP: Interfaces & Anonymous Classes
Java
| Intermediate
- 10 videos | 1h 9m 9s
- Includes Assessment
- Earns a Badge
In this course, you will focus on one of the most important concepts in all object-oriented programming for Java, the interface. Learners explore how anonymous inner classes provide lightweight instantiations of interfaces, and how interfaces are pure abstract entities. Begin with an introduction into using interfaces and how all their methods are abstract by default. Examine how the instanceof operator works the same way with interfaces as with classes. This leads on to combining the extends and implements keywords: implementing a derived class that can extend a base class and implement an interface. Then learners learn to set up two inheritance hierarchies and combine these into a set of objects that implement both sets of interfaces. Advanced features of interfaces are also examined. Learn how interfaces can support default method implementations. You will set up a class that implements some of the methods of an interface and declares itself abstract. Finally, you will create and define anonymous inner class objects and access outer class variables from your anonymous inner class.
WHAT YOU WILL LEARN
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Discover the key concepts covered in this course
Use interfaces and recognized that all of their methods are abstract by default
Recognize how the instanceof operator works the same way with interfaces as with classes
Implement a derived class that can both extend a base class and implement an interface
Set up two inheritance hierarchies and combine these into a set of objects that implement both set of interfaces -
Use interfaces that support default method implementations
Set up a class that implements some of the methods of an interface and then declares itself abstract
Create and define anonymous inner class objects
Access outer class variables from your anonymous inner class
Summarize the key concepts covered in this course
IN THIS COURSE
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2m 19s
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10m 52sDuring this video, you will learn how to use interfaces and recognize that all of their methods are abstract by default. FREE ACCESS
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3. Using instanceof with Interfaces9m 47sUpon completion of this video, you will be able to recognize how the instanceof operator works with interfaces in the same way as with classes. FREE ACCESS
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4. Combining the extends and implements Keywords8m 21sIn this video, you will implement a derived class that can extend a base class and implement an interface. FREE ACCESS
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5. Multiple Inheritance of Interfaces7m 10sIn this video, find out how to set up two inheritance hierarchies and combine these into a set of objects that implement both sets of interfaces. FREE ACCESS
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6. Default Methods in Interfaces7m 32sDuring this video, you will learn how to use interfaces with default method implementations. FREE ACCESS
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7. Abstract Classes that Implement Interfaces6m 46sIn this video, you will learn how to set up a class that implements some of the methods of an interface and then declares itself abstract. FREE ACCESS
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8. Anonymous Inner Classes7m 35sIn this video, find out how to create and define anonymous inner class objects. FREE ACCESS
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9. Outer Class Access from Anonymous Inner Classes6m 51sIn this video, learn how to access outer class variables from your anonymous inner class. FREE ACCESS
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10. Course Summary1m 56s
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