接口源码：
public interface BlockingQueue<E> extends Queue<E> {
/**
* 向队列中添加元素 成功返回true，队列满了则抛出异常
*/
boolean add(E e);
/**
* 向队列中添加元素，成功返回true，队列满了返回false
*/
boolean offer(E e);
/**
* 向队列中添加元素，如果队列满了会一直阻塞直到插入成功
*/
void put(E e) throws InterruptedException;
/**
* 向队列插入数据，成功则返回true，如果队列满了则阻塞指定时间，在阻塞时间内成功则返回true，否则返回false
*/
boolean offer(E e, long timeout, TimeUnit unit)
throws InterruptedException;
/**
* 移除并返回当前队列的第一个元素，如果没有数据则一直阻塞直到有数据
*/
E take() throws InterruptedException;
/**
* 移除并返回队列的第一个元素，如果没有数据则阻塞至指定时间
*/
E poll(long timeout, TimeUnit unit)
throws InterruptedException;
/**
* 返回队列剩余空间
*/
int remainingCapacity();
/**
* Removes a single instance of the specified element from this queue,
* if it is present. More formally, removes an element {@code e} such
* that {@code o.equals(e)}, if this queue contains one or more such
* elements.
* Returns {@code true} if this queue contained the specified element
* (or equivalently, if this queue changed as a result of the call).
*
* @param o element to be removed from this queue, if present
* @return {@code true} if this queue changed as a result of the call
* @throws ClassCastException if the class of the specified element
* is incompatible with this queue
* (<a href="../Collection.html#optional-restrictions">optional</a>)
* @throws NullPointerException if the specified element is null
* (<a href="../Collection.html#optional-restrictions">optional</a>)
*/
boolean remove(Object o);
/**
* Returns {@code true} if this queue contains the specified element.
* More formally, returns {@code true} if and only if this queue contains
* at least one element {@code e} such that {@code o.equals(e)}.
*
* @param o object to be checked for containment in this queue
* @return {@code true} if this queue contains the specified element
* @throws ClassCastException if the class of the specified element
* is incompatible with this queue
* (<a href="../Collection.html#optional-restrictions">optional</a>)
* @throws NullPointerException if the specified element is null
* (<a href="../Collection.html#optional-restrictions">optional</a>)
*/
public boolean contains(Object o);
/**
* Removes all available elements from this queue and adds them
* to the given collection. This operation may be more
* efficient than repeatedly polling this queue. A failure
* encountered while attempting to add elements to
* collection {@code c} may result in elements being in neither,
* either or both collections when the associated exception is
* thrown. Attempts to drain a queue to itself result in
* {@code IllegalArgumentException}. Further, the behavior of
* this operation is undefined if the specified collection is
* modified while the operation is in progress.
*
* @param c the collection to transfer elements into
* @return the number of elements transferred
* @throws UnsupportedOperationException if addition of elements
* is not supported by the specified collection
* @throws ClassCastException if the class of an element of this queue
* prevents it from being added to the specified collection
* @throws NullPointerException if the specified collection is null
* @throws IllegalArgumentException if the specified collection is this
* queue, or some property of an element of this queue prevents
* it from being added to the specified collection
*/
int drainTo(Collection<? super E> c);
/**
* Removes at most the given number of available elements from
* this queue and adds them to the given collection. A failure
* encountered while attempting to add elements to
* collection {@code c} may result in elements being in neither,
* either or both collections when the associated exception is
* thrown. Attempts to drain a queue to itself result in
* {@code IllegalArgumentException}. Further, the behavior of
* this operation is undefined if the specified collection is
* modified while the operation is in progress.
*
* @param c the collection to transfer elements into
* @param maxElements the maximum number of elements to transfer
* @return the number of elements transferred
* @throws UnsupportedOperationException if addition of elements
* is not supported by the specified collection
* @throws ClassCastException if the class of an element of this queue
* prevents it from being added to the specified collection
* @throws NullPointerException if the specified collection is null
* @throws IllegalArgumentException if the specified collection is this
* queue, or some property of an element of this queue prevents
* it from being added to the specified collection
*/
int drainTo(Collection<? super E> c, int maxElements);
}
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