The integrated earthquake information displaying and message announcing system is one of the application software of information subentry of China Digital Seismic Observation Network.
“地震综合信息显示与消息通告系统”是中国数字地震观测网络信息分项应用软件之一。
Sending a message to an object that does not handle that message is an error. However, before announcing the error, the runtime system gives the receiving object a second chance to handle the message.
当一个对象不能正常及时处理发送过来的消息时会导致异常，runtime系统在发生异常之前提供了第二次机会处理消息的机会。
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