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To list sub directories recursively in a given directory

/ Published in: Java
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  1. import java.io.File;
  2. import java.util.ArrayList;
  3. import java.util.Iterator;
  4. import java.util.List;
  5.  
  6. /**
  7.  * 
  8.  */
  9.  
  10. /**
  11.  * @author hariharan_kumar
  12.  *
  13.  */
  14. public class Dfs {
  15.  
  16. 	List<String> directoryLists;
  17. 	/**
  18. 	 * 
  19. 	 */
  20. 	public Dfs() {
  21.  
  22. 		directoryLists = new ArrayList<String>();
  23.  
  24. 	}
  25.  
  26. 	/**
  27. 	 * @param args
  28. 	 */
  29. 	public static void main(String[] args) {
  30.  
  31. 		Dfs df = new Dfs();
  32. 		df.iterate("G:/jbossTest");
  33. 		df.displayDirList();
  34.  
  35. 	}
  36.  
  37. 	public void iterate(String baseDir)
  38. 	{
  39. 		File folder_and_files = new File(baseDir);
  40. 		File[] file_array = folder_and_files.listFiles();
  41.  
  42. 		for(int i = 0;i < file_array.length;i++)
  43. 		{
  44. 			if(file_array[i].isDirectory())
  45. 			{
  46. 				//System.out.println("Directory  is : " + file_array[i].getName());
  47. 				directoryLists.add(file_array[i].getAbsolutePath());
  48. 				iterate(file_array[i].getAbsolutePath());
  49. 			}
  50. 			else if (file_array[i].isFile())
  51. 			{
  52. 				//System.out.println("File is : " + file_array[i].getAbsolutePath());
  53.  
  54. 			}
  55. 			else if(file_array.length == i)
  56. 			{
  57. 				return;
  58. 			}
  59.  
  60. 		}		
  61. 	}
  62.  
  63. 	public void displayDirList()
  64. 	{
  65. 		Iterator<String> i = directoryLists.iterator();
  66. 		while(i.hasNext())
  67. 		{
  68. 			System.out.println(i.next());
  69. 		}
  70. 	}
  71. }

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