Yes i am using Eclipse IDE, i tried other import statements and errors are gone now.

Map<String,String> availablity = new HashMap<String,String>();
List<Rule>myGlobal = new ArrayList<Rule>();
//Feature feature = new Feature();
try{
LOG.info("Before calling the function readKnowledgeBase");
//KnowledgeBase kbase = readKnowledgeBase();
LOG.info("Rule file is loaded");
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource("AvailabilityRule.drl"), ResourceType.DRL);
LOG.info("Rule file added to the knowledgebuilder");
KnowledgeBuilderErrors errors = kbuilder.getErrors();
if (errors.size() > 0) {
for (KnowledgeBuilderError error: errors) {
LOG.error(errors);
LOG.error("in error loop of readKnowledgeBase");
}
throw new IllegalArgumentException("Could not parse knowledge.");
}
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
 
Collection<KnowledgePackage>kpackages = kbuilder.getKnowledgePackages();
kbase.addKnowledgePackages(kpackages);
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, "test");
ksession.setGlobal("availablity", availablity);
for(KnowledgePackage kpackage : kpackages) {
   for(org.drools.definition.rule.Rule rule : kpackage.getRules()) {
       myGlobal.add((Rule) rule);
   }
}

ksession.insert(Obj1);
ksession.insert(Obj2);
LOG.info("Rules are fired");
ksession.addEventListener(new DefaultAgendaEventListener() {
   @Override
public
   void activationCreated(ActivationCreatedEvent event) {
       myGlobal.remove(event.getActivation().getRule());
   }

   @Override
public
   void activationCancelled(ActivationCancelledEvent event) {
       myGlobal.add((Rule) event.getActivation().getRule());
   }
});
ksession.addEventListener( new DefaultAgendaEventListener() {
   public void afterActivationFired(AfterActivationFiredEvent event) {
       super.afterActivationFired( event );
       System.out.println( event );
   }
});
ksession.fireAllRules();




i declared myGlobal at the top of the program before the rule file is loading. the added code is in bold. it changed Rule:rule to some import statement, i guess that is because of casting. but in the both of the action listeners it is giving me an error saying that myGlobal should be declared final because of inner class. if i will declare this final i cant do anything with this. this is the last error which i have now. please suggest what to do with that.

Thanks