cn.featherfly.common.structure

Class LimitQueue<E>

java.lang.Object

cn.featherfly.common.structure.LimitQueue<E>

Type Parameters:

E - the element type

All Implemented Interfaces:

java.lang.Iterable<E>, java.util.Collection<E>, java.util.Queue<E>

public class LimitQueue<E>
extends java.lang.Object
implements java.util.Queue<E>

固定长度队列.

Constructor Summary

Constructors

Constructor and Description
LimitQueue(int limit) Instantiates a new limit queue.
LimitQueue(int limit, java.util.Queue<E> queue) Instantiates a new limit queue.
LimitQueue(int limit, java.util.Queue<E> queue, java.util.concurrent.locks.Lock lock) Instantiates a new limit queue.

Method Summary

Modifier and Type	Method and Description
boolean	add(E e)
boolean	addAll(java.util.Collection<? extends E> c)
void	clear()
boolean	contains(java.lang.Object o)
boolean	containsAll(java.util.Collection<?> c)
E	element()
boolean	equals(java.lang.Object o) Equals.
int	getLimit() 获取限制大小.
java.util.Queue<E>	getQueue() 获取队列.
int	hashCode() Hash code.
boolean	isEmpty()
java.util.Iterator<E>	iterator()
boolean	offer(E e) 入队.
E	peek()
E	poll() 出队.
E	remove()
boolean	remove(java.lang.Object o)
boolean	removeAll(java.util.Collection<?> c)
boolean	retainAll(java.util.Collection<?> c)
int	size()
java.lang.Object[]	toArray()
<T> T[]	toArray(T[] a)
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, removeIf, spliterator, stream

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

LimitQueue

public LimitQueue(int limit)

Instantiates a new limit queue.

Parameters:

limit - 队列长度

LimitQueue

public LimitQueue(int limit,
                  java.util.Queue<E> queue)

Instantiates a new limit queue.

Parameters:

limit - 队列长度

queue - 队列

LimitQueue

public LimitQueue(int limit,
                  java.util.Queue<E> queue,
                  java.util.concurrent.locks.Lock lock)

Instantiates a new limit queue.

Parameters:

limit - 队列长度

queue - 队列

lock - 锁

Method Detail

offer

public boolean offer(E e)

入队.

Specified by:

offer in interface java.util.Queue<E>

Parameters:

e - element

Returns:

true, if successful

poll

public E poll()

出队.

Specified by:

poll in interface java.util.Queue<E>

Returns:

element

getQueue

public java.util.Queue<E> getQueue()

获取队列.

Returns:

queue

getLimit

public int getLimit()

获取限制大小.

Returns:

limit

add

public boolean add(E e)

Specified by:

add in interface java.util.Collection<E>

Specified by:

add in interface java.util.Queue<E>

element

public E element()

Specified by:

element in interface java.util.Queue<E>

peek

public E peek()

Specified by:

peek in interface java.util.Queue<E>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Collection<E>

size

public int size()

Specified by:

size in interface java.util.Collection<E>

remove

public E remove()

Specified by:

remove in interface java.util.Queue<E>

addAll

public boolean addAll(java.util.Collection<? extends E> c)

Specified by:

addAll in interface java.util.Collection<E>

clear

public void clear()

Specified by:

clear in interface java.util.Collection<E>

contains

public boolean contains(java.lang.Object o)

Specified by:

contains in interface java.util.Collection<E>

containsAll

public boolean containsAll(java.util.Collection<?> c)

Specified by:

containsAll in interface java.util.Collection<E>

iterator

public java.util.Iterator<E> iterator()

Specified by:

iterator in interface java.lang.Iterable<E>

Specified by:

iterator in interface java.util.Collection<E>

remove

public boolean remove(java.lang.Object o)

Specified by:

remove in interface java.util.Collection<E>

removeAll

public boolean removeAll(java.util.Collection<?> c)

Specified by:

removeAll in interface java.util.Collection<E>

retainAll

public boolean retainAll(java.util.Collection<?> c)

Specified by:

retainAll in interface java.util.Collection<E>

toArray

public java.lang.Object[] toArray()

Specified by:

toArray in interface java.util.Collection<E>

toArray

public <T> T[] toArray(T[] a)

Specified by:

toArray in interface java.util.Collection<E>

equals

public boolean equals(java.lang.Object o)

Equals.

Specified by:

equals in interface java.util.Collection<E>

Overrides:

equals in class java.lang.Object

Parameters:

o - object

Returns:

true if the specified object is equal to this

See Also:

Collection.equals(java.lang.Object)

hashCode

public int hashCode()

Hash code.

Specified by:

hashCode in interface java.util.Collection<E>

Overrides:

hashCode in class java.lang.Object

Returns:

the hash code value for this queue

See Also:

Collection.hashCode()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object