org.h2.util

Class 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 and Description
ByteStack() Creates a new empty instance.

Method Summary

Modifier and Type	Method and 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