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In this chapter we are going to be working with classes and packages. In this movie, we will just review what packages and classes are. If you are following along, I am in understanding.swf and that's in the understanding folder in the Chapter 4 folder in the Exercise Files folder. The simple definition of a package is a folder that contains classes. If you are following along in this file, you can click on the folder and see the classes come out of the package. This package is the folder, classes are the files, and you are pretty familiar with packages and classes.
If I click the package again, we can see that the flash.display package contains these three classes, MovieClip, Loader and Sprite. I know this may seem very basic but as we go forward it's really fundamental to understand the difference between packages and classes. The last thing you want to know, which you are probably already are very familiar with, is that a package refers to the place where the files can be found. So flash.display is actually a path to the following files. Now that we have a good foundation of what packages and classes are, let's start working with them.
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