Java的Filestore類的supportsFileAttributeView（...）

我嘗試在我的環境中添加對UserDefinedFileAttributeView的支持。這是我迄今爲止所做的。我已經添加了 'user_xattr' 選項/ etc/fstab文件：Java的Filestore類的supportsFileAttributeView（...）

#/was on /dev/sda3 during installation 
UUID=9b1809de-d409-47ce-aee0-dd1e878b0bab/    ext4 errors=remount-ro,user_xattr 0  1 
# /boot was on /dev/sda2 during installation 
UUID=fd898890-17a0-423a-987e-9dc0a5008320 /boot   ext2 defaults  0  2 
# /home was on /dev/sda5 during installation 
UUID=439ea035-cac4-4801-9023-b1b1abb4ab9e /home   ext4 defaults,user_xattr  0  2 
# swap was on /dev/sda1 during installation 
UUID=a534b1c7-1a00-488f-92a8-a530b5d902ac none   swap sw    0  0

這樣一個簡單的代碼：

for (FileStore store : fileSystem.getFileStores()) { 
    boolean supported = store.supportsFileAttributeView(UserDefinedFileAttributeView.class); 
    System.out.println(store.name() + " --- " + supported); 
}

顯示了一個 '/ home'（的/ dev/sdar5）是顯示：

/dev/sda5 --- true

但是，如果我不喜歡這樣寫道：

FileStore store1 = Files.getFileStore((new File("/home")).toPath()); 
boolean supported1 = store1.supportsFileAttributeView(UserDefinedFileAttributeView.class); 
System.out.println(store1.name() + " --- " + supported1);

我得到：