QueueAr - package DataStructures QueueAr class CONSTRUCTION...

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package DataStructures; // QueueAr class // // CONSTRUCTION: with or without a capacity; default is 10 // // ******************PUBLIC OPERATIONS********************* // void enqueue( x ) --> Insert x // Object getFront( ) --> Return least recently inserted item // Object dequeue( ) --> Return and remove least recent item // boolean isEmpty( ) --> Return true if empty; else false // boolean isFull( ) --> Return true if capacity reached // void makeEmpty( ) --> Remove all items // ******************ERRORS******************************** // Overflow thrown for enqueue on full queue /** * Array-based implementation of the queue. * @author Mark Allen Weiss */ public class QueueAr { /** * Construct the queue. */ public QueueAr( ) { this( DEFAULT_CAPACITY ); } /** * Construct the queue. */ public QueueAr( int capacity ) { theArray = new Object[ capacity ]; makeEmpty( ); } /** * Test if the queue is logically empty. * @return true if empty, false otherwise. */ public boolean isEmpty( ) { return currentSize == 0; } /** * Test if the queue is logically full. * @return true if full, false otherwise. */ public boolean isFull( ) { return currentSize == theArray.length; } /**
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* Make the queue logically empty.
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