Method isDirectory

lib/java/io/File.java:796–805

Indicates if this file represents a directory on the underlying file system. @return true if this file is a directory, false otherwise. @throws SecurityException if a SecurityManager is installed and it denies read access to this file

()

     *             access to this file.
     */
    public boolean isDirectory() {
        if (path.length() == 0) {
            return false;
        }
//        SecurityManager security = System.getSecurityManager();
//        if (security != null) {
//            security.checkRead(path);
//        }
        return isDirectoryImpl(properPath(true));
    }

    private native boolean isDirectoryImpl(byte[] filePath);