Question

I have been given an answer in question:
Create folders from folder id and parent id in java

It was very useful but I do not understand the last part of the answer:

“Finally, just grab the folder with id 0 and start building your Files on the disk, using folder.getChildren() as a convenient way to move down the tree. Check out the javadoc on the File object, you will particularly want to use the mkdirs() method.”

I don’t even know where to being to implement it. Does anyone understand it?

Thank You

Answer 1

Once your tree of Folder instances has been built, the root of the tree is the Folder with ID 0.

Start with this folder, and create a directory in the file system for each of its children, recursively:

/**
 * Creates a directory in parentDirectory for every child of the given folder,
 * recursively.
 */
public void createDirectoriesForChildren(Folder folder, File parentDirectory) {
    for (Folder childFolder : folder.getChildren()) {
        File directory = new File(parentDirectory, childFolder.getName());
        directory.mkdirs();
        createDirectoriesForChildren(childFolder, directory);
    }
}