8. Sockets, Files, and Streams

Activity 1: Writing the Directory Structure to a File

Solution

1. Import the relevant classes to get this example to work. Basically you will be working with collections, files, and the associated exceptions.

   import java.io.IOException;
   import java.nio.file.*;
   import java.nio.file.attribute.BasicFileAttributes;
   import java.util.Collections;

2. Determine the folder you will start looking for directories from. Let's assume you start from user.home. Declare a Path object linking to that folder.

   Path path = Paths.get(System.getProperty("user.home"));

3. Next you will call File.walkFileTree, which will allow you iterate through a folder structure up to a certain depth. In this case, you can set whatever depth you want, for example 10. This means the program will dig up to 10 levels of directories looking for files.

   Files.walkFileTree(path, Collections.emptySet(), 10, new SimpleFileVisitor<Path>() { [...]

4. The approach in this...