java.util
Class Queue

java.lang.Object
  java.util.Vector
      java.util.Queue

public class Queue

extends Vector

A FIFO Queue of objects.

Field Summary

Fields inherited from class java.util.Vector

capacityIncrement, elementCount, elementData

Constructor Summary

Queue()
creates a new Queue instance

Method Summary

boolean	empty() is this Queue empty?
Object	peek() fetches an object from the start of the Queue does not remove it!
Object	pop() fetches an object from the start of the Queue and removes it
Object	push(Object anObject) pushes an object onto the Queue

Methods inherited from class java.util.Vector

addElement, capacity, clear, elementAt, ensureCapacity, equals, indexOf, indexOf, insertElementAt, isEmpty, lastIndexOf, lastIndexOf, removeAllElements, removeElement, removeElementAt, setElementAt, setSize, size, toArray, trimToSize

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, toString, wait, wait

Constructor Detail

Queue

public Queue()

creates a new Queue instance

Method Detail

push

public Object push(Object anObject)

pushes an object onto the Queue

Returns:

Object the object pushed onto the Queue

pop

public Object pop()
           throws EmptyQueueException

fetches an object from the start of the Queue and removes it

Returns:

Object the object removed from the start of the stock

Throws:

EmptyQueueException

peek

public Object peek()
            throws EmptyQueueException

fetches an object from the start of the Queue
does not remove it!

Returns:

Object the object at the start of the Queue

Throws:

EmptyQueueException

empty

public boolean empty()

is this Queue empty?

Returns:

boolean true, if the Queue is empty