Last semester I took an archaeology class and we spent a lot of time studying ways to date things.

上学期我上了一门考古学的课，在这门课上我们花了很多时间来研究确定物件日期的方法。

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You will first create a new project and a class that will implement a simple service that returns the system date and time of the server on which the service is running.

您首先将创建一个新的项目和一个类，这个类将实现一个简单的服务：返回服务运行所在服务器的系统日期和时间。

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This class supports changing the date by different settings via constants in the Calendar class; for example, Calendar.WEEK_OF_MONTH to change the date one week at a time.

该类支持通过将 Calendar 类中的常数设置为不同的值来更改日期；例如， Calendar.WEEK_OF_MONTH 每次将日期更改一周。

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