ByteStack

java.lang.Object
- org.h2.util.ByteStack

```
public final class ByteStack
extends java.lang.Object
```
The stack of byte values. This class is not synchronized and should not be used by multiple threads concurrently.

Constructor Summary

Constructors
Constructor Description

ByteStack()
Creates a new empty instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`isEmpty()`	Returns `true` if this stack is empty.
`int`	`peek(int defaultValue)`	Looks at the item at the top of this stack without removing it.
`int`	`poll(int defaultValue)`	Removes the item at the top of this stack and returns that item.
`byte`	`pop()`	Removes the item at the top of this stack and returns that item.
`void`	`push(byte item)`	Pushes an item onto the top of this stack.
`int`	`size()`	Returns the number of items in this stack.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ByteStack
```
public ByteStack()
```
    Creates a new empty instance.
- Method Detail
  - push
```
public void push(byte item)
```
    Pushes an item onto the top of this stack.
    
    Parameters:
    
    item - the item to push
  - pop
```
public byte pop()
```
    Removes the item at the top of this stack and returns that item.
    
    Returns:
    
    the item at the top of this stack
    
    Throws:
    
    java.util.NoSuchElementException - if stack is empty
  - poll
```
public int poll(int defaultValue)
```
    Removes the item at the top of this stack and returns that item.
    
    Parameters:
    
    defaultValue - value to return if stack is empty
    
    Returns:
    
    the item at the top of this stack, or default value
  - peek
```
public int peek(int defaultValue)
```
    Looks at the item at the top of this stack without removing it.
    
    Parameters:
    
    defaultValue - value to return if stack is empty
    
    Returns:
    
    the item at the top of this stack, or default value
  - isEmpty
```
public boolean isEmpty()
```
    Returns true if this stack is empty.
    
    Returns:
    
    true if this stack is empty
  - size
```
public int size()
```
    Returns the number of items in this stack.
    
    Returns:
    
    the number of items in this stack