Making a queue using two stack

simulated_queue.java

public void function queue(Node node) {
	stackToStore.push(node);
}

public Node function dequeue() {
	if(stackToRetrive.top==null) {
	     while(stackToStore.top!=null) {
		 Node tmp = stackToStore.pop();
		 stackToRetrive.push(tmp);
	     }	
	}

	return stackToRetrive.pop();
}