Doesn't work event in java jade [migrated]

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http://serverfault.com – I have problem with event in Java. I have got two jade's class: First class import jade.core.Agent; import jade.core.behaviours.*; import jade.lang.acl.ACLMessage; import jade.lang.acl.MessageTemplate; import jade.domain.DFService; import jade.domain.FIPAException; import jade.domain.FIPAAgentManagement.DFAgentDescription; import jade.domain.FIPAAgentManagement.ServiceDescription; import java.util.*; public class BookSellerAgent extends Agent { // The catalogue of books for sale (maps the title of a book to its price) private Hashtable catalogue; // The GUI by means of which th (HowTos)