If you want mutable fields, then use the keyword var.

如果你希望有可变的字段，那么使用var关键字。

youdao

Inner classes can refer to mutable instance fields if the inner-class expression occurs in an instance context, but this is not the same thing.

如果内部类表达式出现在某个实例上下文中的话，内部类可以引用可变的实例域instance field，但这不是同一回事。

youdao

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。

youdao

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。

youdao