30 lines
944 B
Java
30 lines
944 B
Java
/**
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An interface for the ADT queue.
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@author Frank M. Carrano
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@author Timothy M. Henry
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@version 4.0
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*/
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public interface QueueInterface<T>
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{
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/** Adds a new entry to the back of this queue.
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@param newEntry An object to be added. */
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public void enqueue(T newEntry);
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/** Removes and returns the entry at the front of this queue.
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@return The object at the front of the queue.
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@throws EmptyQueueException if the queue is empty before the operation. */
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public T dequeue();
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/** Retrieves the entry at the front of this queue.
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@return The object at the front of the queue.
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@throws EmptyQueueException if the queue is empty. */
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public T getFront();
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/** Detects whether this queue is empty.
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@return True if the queue is empty, or false otherwise. */
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public boolean isEmpty();
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/** Removes all entries from this queue. */
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public void clear();
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} // end QueueInterface
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