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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In the following steps, you will create a sender and receiver bean by selecting the method invoked on receipt of a message.

在下面的步骤中，将通过选择接收消息所调用的方法来创建发送方和接收方bean。

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In the Application EJB dialog (Figure 7), you need to choose the method that the receiver bean will invoke. Enter or select the following values.

在Application EJB对话框中(图7)，需要选择接收方bean要调用的方法。

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This method also has the advantage that the placement of the receiver allows the pacing of the heart to be very precisely controlled, says Dr Echt.

ECONOMIST: Case history