遍历d盘输出d盘.txt的文件名

import java.io.File;
 import java.util.ArrayList;
 import java.util.List;public class FileTraversal {
 public static void main(String... _) {
  String path = "D:/";
  List data = new ArrayList();
   data = getData(path, data);  for (int i = 0; i < data.size(); i++) {
    System.out.println(data.get(i));
   }
  } private static List getData(String path, List data) {
  File f = new File(path);
  if (f.isDirectory()) {
    File[] fs = f.listFiles();
    if(null!=fs)
    for (int i = 0; i < fs.length; i++) {
     data = getData(fs[i].getPath(), data);
    }
   } else if (f.getName().endsWith(".txt")) {
    data.add(f.getName());
   }
   return data;
  }}