test&lab

DataLabs/lab5/QueueInterface.java

@@ -0,0 +1,29 @@
+/**
+   An interface for the ADT queue.   
+   @author Frank M. Carrano
+   @author Timothy M. Henry
+   @version 4.0
+*/
+public interface QueueInterface<T>
+{
+  /** Adds a new entry to the back of this queue.
+      @param newEntry  An object to be added. */
+  public void enqueue(T newEntry);
+  
+  /** Removes and returns the entry at the front of this queue.
+      @return  The object at the front of the queue. 
+      @throws  EmptyQueueException if the queue is empty before the operation. */
+  public T dequeue();
+  
+  /**  Retrieves the entry at the front of this queue.
+      @return  The object at the front of the queue.
+      @throws  EmptyQueueException if the queue is empty. */
+  public T getFront();
+  
+  /** Detects whether this queue is empty.
+      @return  True if the queue is empty, or false otherwise. */
+  public boolean isEmpty();
+  
+  /** Removes all entries from this queue. */
+  public void clear();
+} // end QueueInterface