1. import java.io.File;
  2. import java.util.ArrayList;
  3. import java.util.List;
  5. public class DirectoryProcessor {
  7. /**
  8. * Processes a directory structure recursively.
  9. * @param rootDir The root directory to start processing from.
  10. * @param processFile A callback function to process each file.
  11. * @param processDir A callback function to process each directory.
  12. */
  13. public static void processDirectory(File rootDir, ProcessFile processFile, ProcessDirectory processDir) {
  14. if (!rootDir.exists() || !rootDir.isDirectory()) {
  15. return; // Handle invalid input
  16. }
  18. File[] files = rootDir.listFiles();
  19. if (files != null) {
  20. for (File file : files) {
  21. if (file.isFile()) {
  22. processFile.process(file); // Process file
  23. } else if (file.isDirectory()) {
  24. processDir.process(file); // Process directory
  25. processDirectory(file, processFile, processDir); // Recursive call
  26. }
  27. }
  28. }
  29. }
  31. /**
  32. * Interface for processing files.
  33. */
  34. public interface ProcessFile {
  35. void process(File file);
  36. }
  38. /**
  39. * Interface for processing directories.
  40. */
  41. public interface ProcessDirectory {
  42. void process(File dir);
  43. }
  45. public static void main(String[] args) {
  46. // Example usage:
  47. File rootDirectory = new File("test_dir"); // Replace with your actual directory
  49. // Create test directory structure if it doesn't exist
  50. File testDir = new File("test_dir");
  51. if (!testDir.exists()) {
  52. testDir.mkdir();
  53. File subdir1 = new File("test_dir/subdir1");
  54. subdir1.mkdir();
  55. File subdir2 = new File("test_dir/subdir2");
  56. subdir2.mkdir();
  57. File file1 = new File("test_dir/file1.txt");
  58. file1.createNewFile();
  59. File file2 = new File("test_dir/subdir1/file2.txt");
  60. file2.createNewFile();
  61. }
  63. ProcessFile fileProcessor = (file) -> {
  64. System.out.println("Processing file: " + file.getAbsolutePath());
  65. };
  67. ProcessDirectory directoryProcessor = (dir) -> {
  68. System.out.println("Processing directory: " + dir.getAbsolutePath());
  69. };
  71. processDirectory(rootDirectory, fileProcessor, directoryProcessor);
  72. }
  73. }

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