XMLGregorianCalendar objects are mutable, and therefore you can simply set any of the date or time fields directly on the object.

XMLGregorianCalendar对象是可以修改的，因此能够直接设置对象的日期或时间字段。

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Lists, specifically, are handy mutable objects that can conveniently even hold multiple values.

明确的讲，列表是一些便利的可变对象，他们甚至可以方便地保留多个值。

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There are some other issues such as small mutable object creation, such as Rectangle, Point etc, these objects usually cannot be re-used due to synchronization consideration.

一些其他的问题来源于小的可变对象的创建，如Rectangle,Point，这些对象基于同步的考虑通常不可重用。

youdao

There are some other issues such as small mutable object creation, such as Rectangle, Point etc, these objects usually cannot be re-used due to synchronization consideration.

一些其他的问题来源于小的可变对象的创建，如Rectangle,Point，这些对象基于同步的考虑通常不可重用。

youdao