ConcurrentLinkedQueue is an unbounded thread-safe Queue based on linked nodes. All Queues supports insertion at the tail of the queue and removal at the head of the queue, except Deques. Deques are queues but they support element insertion and removal at both ends. (Java Queue Class Diagram...
Summary of Queue methods Throws exception Returns special value Insert add(e) offer(e) Remove remove() poll() Examine element() peek() 队列通常(但不一定)以FIFO(先进先出)方式对元素进行排序。 其中的例外是优先级队列,它根据提供的比较器对元素进行排序,或者元素的自然顺序,以及LIFO队列(或堆栈),它...
*/publicstatic<T> Callable<T>privilegedCallableUsingCurrentClassLoader(Callable<T> callable){if(callable ==null)thrownewNullPointerException();returnnewPrivilegedCallableUsingCurrentClassLoader<T>(callable); }// Non-public classes supporting the public methods/** * A callable that runs given task and...
import java.util.concurrent.ArrayBlockingQueue;import java.util.concurrent.BlockingQueue;import java.util.concurrent.TimeUnit;/** * @ClassName : BlockingQueueMethodsExample * @Description : BlockingQueue常用方法 */public class BlockingQueueMethodsExample { // 创建一个容量为3的阻塞队列 private sta...
This class is likely to be faster than * {@link Stack} when used as a stack, and faster than {@link LinkedList} * when used as a queue. **/ 从文档中我们可以看到,这种队列是没有容量限制的。下面我们来具体鉴赏一下代码。 首先,来看一下队列中的成员变量: 代码语言:javascript...
Epop();// *** Collection methods ***booleanremove(Object o); booleancontains(Object o); public intsize(); Iterator<E>iterator(); Iterator<E>descendingIterator(); } Deque的接口和上面的Queue的操作基本相同。xxxFirst操作队列头部元素,xxxLast操作队列尾部元素。
我们都知道队列(Queue)是一种先进先出(FIFO)的数据结构,Java中定义了java.util.Queue接口用来表示队列。Java中的Queue与List、Set属于同一个级别接口,它们都是继承于Collection接口。 Java中还定义了一种双端队列java.util.Deque,我们常用的LinkedList就是实现了Deque接口。 下面我们看一下类的定义: Queue & Deque ...
Queueimplementations generally do not define element-based versions of methodsequalsandhashCodebut instead inherit the identity based versions from classObject, because element-based equality is not always well-defined for queues with the same elements but different ordering properties. ...
// *** Queue methods *** boolean add(E e); boolean offer(E e); E remove(); E poll(); E element(); E peek(); // *** Stack methods *** void push(E e); E pop(); // *** Collection methods *** boolean remove(Object o); ...
While this class implements the BlockingQueue interface, it intentionally violates the general contract of BlockingQueue, in that the following methods disregard the presence of unexpired elements and only ever remove the expired head: #poll() ...