DataStructures
Interface Stack<E>

Type Parameters:

E - the type of elements held in this stack

All Known Implementing Classes:

StackArray, StackList

public interface Stack<E>

A last-in-first-out (LIFO) stack of objects.

Author:

Peter Williams

Method Summary

boolean	isEmpty() Indicates the status of the stack.
E	pop() Pops an item off the stack.
void	push(E item) Pushes an item onto the stack.

Method Detail

isEmpty

boolean isEmpty()

Indicates the status of the stack.

Returns:

true if the stack is empty.

push

void push(E item)

Pushes an item onto the stack.

Parameters:

item - the item of type E to be pushed.

pop

E pop()

Pops an item off the stack.

Returns:

the item most recently pushed onto the stack

Throws:

NoSuchElementException - if the stack is empty.