CareerCup

public class Queue implements ExamImmutableQueue
{
Queue Q;

public



}

public class Queue<E> implements ExamImmutableQueue
{
List<E> Q;

public ExamImmutableQueue<E> enque(E e)
{
Queue newQueue;
newQueue=new Queue();

for(E temp : Q)
(newQueue.Q).addElement(temp);

(newQueue.Q).addElement(e);


return newQueue


}
void addElement(E e)
{
Q.add(e);
}

}

This is in Implemented in a interface. So you cannot directly make instant of new Queue class directly shows an error

Yes, maybe you want to use one of the classes that implements Queue (I chose ArrayBlockingQueue):

package com.careercup;

import java.util.List;
import java.util.Queue;
import java.util.concurrent.ArrayBlockingQueue;

public class MyImmutableQueue<E> implements ExamImmutableQueue<E> {
	List<E> Q;

	void addElement(E e)
	{
		Q.add(e);
	}

	@Override
	public ExamImmutableQueue<E> enqueue(E e) {
		Queue<E> newQueue=new ArrayBlockingQueue<E>(Q.size() + 1, false, Q);

		for(E temp : Q) newQueue.add(temp);

		newQueue.add(e);

		return this;
	}
}

CAN WE HAVE ANY PACKAGE NAME?? AND NO CODE IS TO BE THERE IN THE PACKAGE??