如果stat抛出一个异常且属性码是2，则说明远程目录不存在。我们则需要创建它并设置正确的权限。

If stat throws an exception with property code equal to 2, the remote directory doesn't exist so we create it, assigning it the correct permissions.

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通过抛出ClassNotFoundException，类装入器提示，定义类时所需要的字节码在类装入器所查找的位置上不存在。

By throwing a ClassNotFoundException, the class loader informs you that the bytecode required to define the class is simply not present in the locations where the class loader is looking for it.

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答：因为很多快餐店已经采纳了“量大的就是好的”这一观点，原来的小份、中份和大份的菜码已经不存在。

Since many fast food restaurants have adopted the "bigger is better" attitude, classic small, medium, and large sizes are no longer available.

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