第一次运行jade4.0

2011-5-2 13:02:08 jade.core.BaseService init
信息: Service jade.core.management.AgentManagement initialized
2011-5-2 13:02:08 jade.core.BaseService init
信息: Service jade.core.messaging.Messaging initialized
2011-5-2 13:02:08 jade.core.BaseService init
信息: Service jade.core.mobility.AgentMobility initialized
2011-5-2 13:02:08 jade.core.BaseService init
信息: Service jade.core.event.Notification initialized
2011-5-2 13:02:08 jade.core.messaging.MessagingService clearCachedSlice
信息: Clearing cache
2011-5-2 13:02:08 jade.mtp.http.HTTPServer
信息: HTTP-MTP Using XML parser com.sun.org.apache.xerces.internal.parsers.SAXParser
2011-5-2 13:02:08 jade.core.messaging.MessagingService boot
信息: MTP addresses:

2011-5-2 13:02:08 jade.core.AgentContainerImpl startBootstrapAgents
严重: Cannot create agent hello: Class HelloWorldAgent for agent ( agent-identifier :name ) not found [nested java.lang.ClassNotFoundException: HelloWorldAgent]
2011-5-2 13:02:08 jade.core.AgentContainerImpl joinPlatform
信息: --------------------------------------
Agent container is ready.
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为什么呢？到底怎么解决这个问题。