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注意：加密文件之后如果忘记了用来加密该文件的密码，再想恢复出原始文件就不可能了。当然，这与密码本身的复杂程度有关，要想保证文件的安全，最好采用较复杂的密码，例如混合运用字母、数字和特殊字符（如“$”符号等）。
4 Ideal click on or press and maintain on an empty place in the folder's background, click on/tap on Form by, and click/faucet on Ascending (default) or Descending to the get you desire. (see screenshot below)
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Zipped (compressed) documents acquire up a lot less cupboard space and might be transferred to other computer systems much more quickly than uncompressed files.
When File Explorer opens, you can expect to land in Rapid access. Your commonly used folders and recently utilised documents are detailed there, so you will not have to dig via a series of folders to uncover them. Pin your preferred folders to Quick access to preserve them near at hand.
As you type in the Look for Box, Windows Search will quickly start out a straightforward lookup through the index by default to match your typed textual content with folder names, information names, the contents of data files, and file Houses. It's going to then display the search engine results in File Explorer.
注意这段代码创建了三个文件流：fin，表示明文形式的原始文件；fout，加密结果文件；crStream，加密流，用来把DES加密的结果转入输出文件fout。增加一个crStream流的好处是不必把结果保存到临时文件或缓冲区。
Does not get the job done ! Be aware, I had no period of time within the look for string and do NOT want a person while in the resultant listing of filenames !
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而这种原始转换（由子类转换为父类）方向相同的可变性，被称为协变（covariant）；其反向操作则被称为逆变（contravariant）。当同样的情形应用于泛型时，例如：
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