About Question com.enthuware.ets.scjp.v6.2.82 :
Posted: Sat May 30, 2015 4:43 pm
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import java.util.*;
class Request { }
class RequestCollector{
//1 : Insert declaration here
public synchronized void addRequest(Request r){
container.add(r);
}
public synchronized Request getRequestToProcess(){
return container.poll();
}
}
What can be inserted at //1?So why the answer(...)the use of poll() method indicates that it must be a Queue. Both LinkedList and PriorityQueue classes implement Queue interface.
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Queue container = new PriorityQueue();and those two are good?
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Queue<Request> container = new LinkedList<Request>();
LinkedList container = new LinkedList();