Display all filenames in a directory

import java.io.File;
import java.io.IOException;

public class RecursiveFileDisplay {

 public static void main(String[] args) {
  File currentDir = new File("."); // current directory
  displayDirectoryContents(currentDir);
 }

 public static void displayDirectoryContents(File dir) {
  try {
   File[] files = dir.listFiles();
   for (File file : files) {
    if (file.isDirectory()) {
     System.out.println("directory:" + file.getCanonicalPath());
     displayDirectoryContents(file);
    } else {
     System.out.println("     file:" + file.getCanonicalPath());
    }
   }
  } catch (IOException e) {
   e.printStackTrace();
  }
 }

}