jb
Class Stack

java.lang.Object
  |
  +--jb.Stack

public class Stack

extends java.lang.Object

The Stack class represents a last-in-first-out stack of objects.

Constructor Summary

Stack()

Method Summary

boolean	isEmpty() Tests if this stack is empty.
java.lang.Object	peek() Returns the object at the top of this stack without removing it.
java.lang.Object	pop() Removes the object at the top of this stack and returns that object.
void	push(java.lang.Object item) Pushes an item on to the top of this stack.

Methods inherited from class java.lang.Object

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

Constructor Detail

Stack

public Stack()

Method Detail

push

public void push(java.lang.Object item)

Pushes an item on to the top of this stack.

Parameters:

item - the item to be pushed.

pop

public java.lang.Object pop()
                     throws java.util.NoSuchElementException

Removes the object at the top of this stack and returns that object.

Returns:

The object at the top of this stack.

Throws:

java.util.NoSuchElementException - if this stack is empty.

peek

public java.lang.Object peek()
                      throws java.util.NoSuchElementException

Returns the object at the top of this stack without removing it.

Returns:

the object at the top of this stack.

Throws:

java.util.NoSuchElementException - if this stack is empty.

isEmpty

public boolean isEmpty()

Tests if this stack is empty.

Returns:

true if this stack is empty and false otherwise.