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All right, so now we're done with the object oriented programming chapter in this chapter, you have

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seen what object oriented programming is, how classes and objects work, how to create objects of classes,

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how to create instances pretty much of classes then what members of classes are.

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Then we have seen how to use interfaces, how to use inheritance, how to also use data classes and

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what scope is.

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All right.

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So these are going to be very important fundamentals that you will need throughout the next chapter.

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So we are going to use all of them at one point or at many points, depending on which specific topic

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we are looking at.

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And many of the things that we have learned are going to happen in the background.

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So many of the functionality that we have seen is actually used already quite a bit by Android itself

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or better set by the different classes that there are already when it comes to Android development.

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And we are using quite some of them.

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So we are constantly already using inheritance because we are using the app activity in our main activity.

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So we're inheriting from it.

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And you will recognize more and more of those things once we get to developing more complex applications.

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OK, so thanks a lot for being with me.

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And let's get to the next chapter.

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See you there.