java.util
Class Stack

java.lang.Object
  |
  +--java.util.Vector
        |
        +--java.util.Stack

All Implemented Interfaces:

Cloneable

public class Stack

extends Vector

A Last-In-First-Out(LIFO) stack of objects.

Field Summary

Fields inherited from class java.util.Vector

capacityIncrement, elementCount, elementData

Constructor Summary

Stack()

Method Summary

boolean	empty() Returns true if the stack is empty.
Object	peek() Peeks at the top of the stack.
Object	pop() Pops an item off the stack.
Object	push(Object item) Pushes an item onto the stack.
int	search(Object o) Sees if an object is on the stack.

Methods inherited from class java.util.Vector

addElement, capacity, clone, contains, copyInto, elementAt, elements, ensureCapacity, firstElement, indexOf, indexOf, insertElementAt, isEmpty, lastElement, lastIndexOf, lastIndexOf, removeAllElements, removeElement, removeElementAt, setElementAt, setSize, size, toString, trimToSize

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Stack

public Stack()

Method Detail

push

public Object push(Object item)

Pushes an item onto the stack.

Parameters:

item - the item to be pushed on.

pop

public Object pop()

Pops an item off the stack.

Throws:

EmptyStackException - If the stack is empty.

peek

public Object peek()

Peeks at the top of the stack.

Throws:

EmptyStackException - If the stack is empty.

empty

public boolean empty()

Returns true if the stack is empty.

search

public int search(Object o)

Sees if an object is on the stack.

Parameters:

o - the desired object

Returns:

the distance from the top, or -1 if it is not found.