java 디렉토리 파일 목록 읽기

package layout;

import java.io.File;

public class ReadDirExample {
 
 public static void main(String[] args) {
  String dir = "C:\\20121231_20131230";
  final File folder = new File(dir);
  readDirectory(folder);
 }
 
 public static void readDirectory(final File folder) {
  for (final File fileEntry : folder.listFiles()) {
         if (fileEntry.isDirectory()) {
             readDirectory(fileEntry);
         } else {
             
             System.out.println(fileEntry.getName());
             
         }
     }
 }
 
 
}