编辑时，缺省日期格式化器允许根据光标的位置在可用的月或日之间滚动。
For example, the default date formatter permits scrolling through the available months or days based upon where the cursor is located while editing.
日期也可以被格式化。
然后介绍了一些Joda概念，以及如何使用Joda执行日期计算和格式化。
Next you looked at some Joda concepts, and then how to use Joda to do date calculations and formatting.
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