ArrayStack (Apache Tomcat 8.0.53 API Documentation)

java.lang.Object
- java.util.AbstractCollection<E>
- - java.util.AbstractList<E>
  - - java.util.ArrayList<E>
    - - org.apache.tomcat.util.digester.ArrayStack<E>

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.lang.Iterable<E>, java.util.Collection<E>, java.util.List<E>, java.util.RandomAccess
```
public class ArrayStack<E>
extends java.util.ArrayList<E>
```
Imported copy of the ArrayStack class from Commons Collections, which was the only direct dependency from Digester.

WARNNG - This class is public solely to allow it to be used from subpackages of org.apache.commons.digester. It should not be considered part of the public API of Commons Digester. If you want to use such a class yourself, you should use the one from Commons Collections directly.

An implementation of the Stack API that is based on an ArrayList instead of a Vector, so it is not synchronized to protect against multi-threaded access. The implementation is therefore operates faster in environments where you do not need to worry about multiple thread contention.

Unlike Stack, ArrayStack accepts null entries.

Since:

Digester 1.6 (from Commons Collections 1.0)

See Also:
Stack, Serialized Form

Field Summary
- Fields inherited from class java.util.AbstractList
  modCount

Constructor Summary

Constructors
Constructor and Description

ArrayStack()
Constructs a new empty ArrayStack.

ArrayStack(int initialSize)
Constructs a new empty ArrayStack with an initial size.

Constructors
Constructor and Description
`ArrayStack()` Constructs a new empty `ArrayStack`.
`ArrayStack(int initialSize)` Constructs a new empty `ArrayStack` with an initial size.

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`empty()` Return `true` if this stack is currently empty.
`E`	`peek()` Returns the top item off of this stack without removing it.
`E`	`peek(int n)` Returns the n'th item down (zero-relative) from the top of this stack without removing it.
`E`	`pop()` Pops the top item off of this stack and return it.
`E`	`push(E item)` Pushes a new item onto the top of this 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
  - ArrayStack
```
public ArrayStack()
```
    Constructs a new empty ArrayStack. The initial size is controlled by ArrayList and is currently 10.
  - ArrayStack
```
public ArrayStack(int initialSize)
```
    Constructs a new empty ArrayStack with an initial size.
    
    Parameters:
    initialSize - the initial size to use
    
    Throws:
    
    java.lang.IllegalArgumentException - if the specified initial size is negative
- Method Detail
  - empty
```
public boolean empty()
```
    Return true if this stack is currently empty.
    This method exists for compatibility with java.util.Stack. New users of this class should use isEmpty instead.
    
    Returns:
    true if the stack is currently empty
  - peek
```
public E peek()
       throws java.util.EmptyStackException
```
    Returns the top item off of this stack without removing it.
    
    Returns:
    the top item on the stack
    
    Throws:
    
    java.util.EmptyStackException - if the stack is empty
  - peek
```
public E peek(int n)
       throws java.util.EmptyStackException
```
    Returns the n'th item down (zero-relative) from the top of this stack without removing it.
    
    Parameters:
    n - the number of items down to go
    
    Returns:
    the n'th item on the stack, zero relative
    
    Throws:
    
    java.util.EmptyStackException - if there are not enough items on the stack to satisfy this request
  - pop
```
public E pop()
      throws java.util.EmptyStackException
```
    Pops the top item off of this stack and return it.
    
    Returns:
    the top item on the stack
    
    Throws:
    
    java.util.EmptyStackException - if the stack is empty
  - push
```
public E push(E item)
```
    Pushes a new item onto the top of this stack. The pushed item is also returned. This is equivalent to calling add.
    
    Parameters:
    item - the item to be added
    
    Returns:
    the item just pushed

Class ArrayStack<E>

Field Summary

Fields inherited from class java.util.AbstractList

Constructor Summary

Method Summary

Methods inherited from class java.util.ArrayList

Methods inherited from class java.util.AbstractList

Methods inherited from class java.util.AbstractCollection

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.List

Constructor Detail

ArrayStack

ArrayStack

Method Detail

empty

peek

peek

pop

push