java - isDirectory() 不适用于 UNIX 目录

Question

对于以下代码，我得到的 isDirectory() 值为 false :-

public void validateFile() throws IOException {

        File dir = new File(Labels.INPUT_FILE_DIR).getCanonicalFile(); 
        // Labels.INPUT_FILE_DIR is ./Input (i.e. my Input folder in UNIX server
        String code, fileName = "";
        ArrayList<String> fileList = new ArrayList<String>();

        Logger.info(cName,mName,"");
        System.out.println("dir.isDirectory() " + dir.isDirectory()); // getting false here

        if (dir.isDirectory()) {

            for (File tempFile : dir.listFiles()) {
                System.out.println("inside the for loop ");

            }
        }

    }

我做错了什么吗？谁能帮帮我。

Answer 1

来自 public boolean isDirectory()

true if and only if the file denoted by this abstract pathname exists and is a directory; false otherwise

看起来您的路径无效，您能否提供完整路径并检查其是否有效。