java - 列出java中的文件夹和子文件夹

Question

我一直在尝试使用这段代码在 Java 中显示文件夹列表:

class Folder {
   boolean isFile;
   String folderName;
   List<Folder> subFolders = new ArrayList<Folder>;
}

class ListF {
   public static void main(String args[]) {
      File fname = new File("C:/hello");
      Folder obj = new Folder();
      if (fname.isDirectory()) {
         File[] fileNames;
         fileNames = fname.listFiles();
         for (i = 0; i < fileNames.length; i++) {
            obj.subFolders.add(fileNames[i]);
         }
         System.out.println("The list is " + obj.subFolders);
      }
   }
}

但是我的代码中出现错误:

ListF.java:5: '(' or '[' expected List<Folder> subFolders=new ArrayList<Folder>;

谁能指出我的错误？谢谢。

Answer 1

替换new ArrayList<Folder>;通过 new ArrayList<Folder>();