Accessing files in a folder

I'm wanting to a do a little program that will access the images in a folder and display them. If I have access to a function that could select the next file in a folder I could create the rest myself, but I haven't heard of a function that does this.
Anyone able to point me in the right direction?

You can get an array of File for all files in a given directory using File.listFiles(). So create a new File that represents the directory with all the images in it then get an array using listFiles() and then iterate over that array displaying each.

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