The Receiver object is nothing more than a Generic Parameter with an overriddendisplay function.
具有接收器功能对象只不过是一个普通的参数覆盖了显示功能而已。
When a message arrives, Sametime post Service notifies the Receiver object by calling the posted function of PostServiceListener interface.
当消息到达时,Sametime post Service通过调用PostServiceListener接口的posted函数通知Receiver对象。
A virtual method invocation, for example, involves looking at the class of the receiver object for the call to discover which actual target implements the virtual method for the receiver object.
例如,一个虚方法调用需要查看接收方对象的类调用,以便找出哪个实际目标实现了接收方对象的虚方法。
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