How to traverse a directory using recursion ?

Example

Traverse a directory recursively and display its contents

public static void main (String args[]) {

  display(new File("C:\\Downloads"));

}

public static void display(File node) {

  // print file path

  System.out.println(node.getAbsoluteFile());

  // if a directory found, again display its contents using recursion

  if (node.isDirectory()) {

    String[] subNodes = node.list();

    for(String filename : subNodes) {

      // File to display = file path + file name

      display(new File(node, filename));

    }

  }

}