fi.joensuu.cs.tra
Class LinkedStack<E>

java.lang.Object
  java.util.AbstractCollection<E>
      java.util.AbstractList<E>
          java.util.AbstractSequentialList<E>
              java.util.LinkedList<E>
                  fi.joensuu.cs.tra.LinkedStack<E>

All Implemented Interfaces:

Serializable, Cloneable, Iterable<E>, Collection<E>, List<E>, Queue<E>

public class LinkedStack<E>
extends LinkedList<E>

LinkedStack extends java.util.LinkedList with behaviour expected of a Stack.

See Also:

LinkedList, Serialized Form

Field Summary

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

LinkedStack()
Creates an empty Stack.

LinkedStack(Collection<? extends E> c)
Constructs a stack containing the elements of the specified collection, in the order they are returned by the collection's iterator.

Method Summary

void	isEmpty() Returns true if stack is empty
E	peek() Returns but does not remove the element at the top of this stack.
E	pop() Removes and returns the element at the top of this stack.
void	push(E o) Pushes an element onto the top of this stack.

Methods inherited from class java.util.LinkedList

add, add, addAll, addAll, addFirst, addLast, clear, clone, contains, element, get, getFirst, getLast, indexOf, lastIndexOf, listIterator, offer, poll, remove, remove, remove, removeFirst, removeLast, set, size, toArray, toArray

Methods inherited from class java.util.AbstractSequentialList

iterator

Methods inherited from class java.util.AbstractList

equals, hashCode, listIterator, removeRange, subList

Methods inherited from class java.util.AbstractCollection

containsAll, removeAll, retainAll, 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, iterator, listIterator, removeAll, retainAll, subList

Constructor Detail

LinkedStack

public LinkedStack()

Creates an empty Stack.

LinkedStack

public LinkedStack(Collection<? extends E> c)

Constructs a stack containing the elements of the specified collection, in the order they are returned by the collection's iterator.

Parameters:

c - the collection whose elements are to be placed into this stack.

Throws:

NullPointerException - if the specified collection was null.

Method Detail

push

public void push(E o)

Pushes an element onto the top of this stack.

Parameters:

o - the element to be pushed onto this stack.

pop

public E pop()

Removes and returns the element at the top of this stack.

Returns:

the element at the top of this stack or null if this stack is empty.

peek

public E peek()

Returns but does not remove the element at the top of this stack.

Specified by:

peek in interface Queue<E>

Overrides:

peek in class LinkedList<E>

Returns:

the element at the top of this stack or null if this stack is empty.

isEmpty

public void isEmpty()

Returns true if stack is empty