java.util
Class Stack

java.lang.Object
  java.util.Vector
      java.util.Stack

public class Stack

extends Vector

A LIFO stack of objects. TODO recycable

Field Summary

Fields inherited from class java.util.Vector

capacityIncrement, elementCount, elementData

Constructor Summary

Stack()
creates a new Stack instance

Method Summary

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

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

Stack

public Stack()

creates a new Stack instance

Method Detail

push

public Object push(Object anObject)

pushes an object onto the stack

Returns:

Object the object pushed onto the stack

pop

public Object pop()
           throws EmptyStackException

fetches an object from the top of the stack and removes it

Returns:

Object the object removed from the top of the stock

Throws:

EmptyStackException

peek

public Object peek()
            throws EmptyStackException

fetches an object from the stack
does not remove it!

Returns:

Object the object at the top of the stack

Throws:

EmptyStackException

empty

public boolean empty()

is this stack empty?

Returns:

boolean true, if the stack is empty