[OCPJP]取得目錄下所有檔案的屬性

Given the code fragment:

Stream<Path> files = Files.walk(Paths.get(System.getProperty("user.home")));
files.forEach(fName -> { //line n1
    try {
        Path aPath = fName.toAbsolutePath(); //line n2
        System.out.println(fName + ":"
                + Files.readAttributes(aPath, BasicFileAttributes.class).creationTime());
    } catch (IOException ex) {
        ex.printStackTrace();
    }
});

What is the result?

A. All files and directories under the home directory are listed along with their attributes.
B. A compilation error occurs at line n1.
C. The files in the home directory are listed along with their attributes.
D. A compilation error occurs at line n2.

題解

「System.getProperty("user.home")」會取得使用者的家目錄路徑。Paths類別的get方法可以傳入路徑字串物件或是URI物件來產生Path物件。Files類別的walk方法可以產生串流物件，以深度優先走訪傳入的Path物件所代表的檔案目錄。

所以選項A是正確答案。