Get all files and folders under a certain folder and save them to a set : Directory « File « Java Tutorial






  1. Java Tutorial
  2. File
  3. Directory
import java.io.File;
import java.util.HashSet;
import java.util.Set;

public class Main {
  public static void main(String[] argv) {
    Set<File> all = new HashSet<File>();
    getAllFileAndFolder(new File("c:\\"), all);
  }

  public static void getAllFileAndFolder(File folder, Set<File> all) {
    all.add(folder);
    if (folder.isFile()) {
      return;
    }
    for (File file : folder.listFiles()) {
      all.add(file);
      if (file.isDirectory()) {
        getAllFileAndFolder(file, all);
      }
    }
  }
}








11.4.Directory
11.4.1.Create a directory (or several directories)
11.4.2.Create directory
11.4.3.Create directory along with required nonexistent parent directories
11.4.4.Create a directory; all ancestor directories must exist
11.4.5.Create a directory; all non-existent ancestor directories are automatically created
11.4.6.Create a directories recursively
11.4.7.Creates a new and empty directory in the default temp directory using the given prefix.
11.4.8.Determine File or Directory
11.4.9.Deleting a Directory (an empty directory)
11.4.10.Determine if file or directory exists
11.4.11.Determine if File or Directory is hidden
11.4.12.If a file or directory readable
11.4.13.Get name of parent directory
11.4.14.Get name of specified file or directory
11.4.15.Get parent directory as a File object
11.4.16.Get the content of a directory
11.4.17.Checks, whether the child directory is a subdirectory of the base directory.
11.4.18.Delete file or directory
11.4.19.Delete directory recursively
11.4.20.Delete file or directory when virtual machine terminates
11.4.21.Calculate directory size
11.4.22.Change last modified time of a file or directory
11.4.23.Mark file or directory Read Only
11.4.24.Rename file or directory
11.4.25.Moving a File or Directory to Another Directory
11.4.26.Search for files recursively
11.4.27.Traversing all files and directories under dir
11.4.28.Traversing only directories under dir
11.4.29.Traversing only files under dir
11.4.30.Copying a Directory
11.4.31.Check if a directory is not empty
11.4.32.Getting the Current Working Directory
11.4.33.Get all files and folders under a certain folder and save them to a set
11.4.34.Recursively search a directory tree
11.4.35.Searches through the directory tree