When output is created from multiple files or the standard input stream, the current date and time are used instead of the filename and creation date.
当从多个文件或标准输入流创建输出时，可以使用当前日期和时间替换文件名和创建日期。
Even more people seem to use the DateFormat and SimpleDateFormat classes for working with date strings, both for input and output.
更多的人似乎使用DateFormat和SimpleDateFormat类来操作日期字符串，既用于输入也用于输出。
On the operation, set an input called date of type date and an output called day of type int. The final result should look like Figure 2.
对于该操作，设置一个名为date的日期类型的输入，以及一个名为day的整数类型的输出。
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