edu.umd.cs.piccolo.util
Class PStack

java.lang.Object
  java.util.AbstractCollection
      java.util.AbstractList
          java.util.ArrayList
              edu.umd.cs.piccolo.util.PStack

All Implemented Interfaces:

Serializable, Cloneable, Iterable, Collection, List, RandomAccess

public class PStack
extends ArrayList

PStack this class should be removed when a non thread safe stack is added to the java class libraries.

Version:

1.0

Author:

Jesse Grosjean

See Also:

Serialized Form

Field Summary

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

PStack()
Creates an empty stack.

Method Summary

Object	peek() Returns topmost element on the stack, or null if stack is empty.
Object	pop() Removes top element on the stack and returns it.
void	push(Object o) Pushes the provided object onto the top of the stack.

Methods inherited from class java.util.ArrayList

add, add, addAll, addAll, clear, clone, contains, ensureCapacity, get, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, removeRange, retainAll, set, size, subList, toArray, toArray, trimToSize

Methods inherited from class java.util.AbstractList

equals, hashCode

Methods inherited from class java.util.AbstractCollection

containsAll, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.List

containsAll, equals, hashCode

Constructor Detail

PStack

public PStack()

Creates an empty stack.

Method Detail

push

public void push(Object o)

Pushes the provided object onto the top of the stack.

Parameters:

o - object to add to the stack

peek

public Object peek()

Returns topmost element on the stack, or null if stack is empty.

Returns:

topmost element on the stack, or null if empty

pop

public Object pop()

Removes top element on the stack and returns it.

Returns:

topmost element on stack.