public class PriorityBlockingQueue<E> extends AbstractQueue<E> implements BlockingQueue<E>, java.io.Serializable { public PriorityBlockingQueue() { this(DEFAULT_INITIAL_CAPACITY, null); } public PriorityBlockingQueue(int initialCapacity) { this(initialCapacity, null); } public PriorityBlockingQueue(int...
public class PriorityBlockingQueue<E> extends AbstractQueue<E>implements BlockingQueue<E>, java.io.Serializable {public PriorityBlockingQueue() {this(DEFAULT_INITIAL_CAPACITY, null);}public PriorityBlockingQueue(int initialCapacity) {this(initialCapacity, null);}public PriorityBlockingQueue(int initialCapacit...
public PriorityQueue(Collection<? extends E> c) {...} public PriorityQueue(SortedSet<? extends E> c) {...} ... } // @since 1.5 AbstractQueue这个类也是1.5后出现的 我们发现它还继承自AbstractCollection 所以它也是个Collection public abstract class AbstractQueue<E> extends AbstractCollection<E> im...
需要注意的是,PriorityBlockingQueue只有一个条件等待队列——notEmpty,因为构造时不会限制最大容量且会自动扩容,所以插入元素并不会阻塞,仅当队列为空时,才可能阻塞“出队”线程。 public class PriorityBlockingQueue<E> extends AbstractQueue<E> implements BlockingQueue<E>, java.io.Serializable { /** * 默认...
Queue Interface As you might have already guessed Queue in Java is an Interface that extends Collection Interface. There are only six methods in here and they are: add(Object e) offer(Object e) element() peek() poll() remove() The last four methods namely, element(), peek(), poll()...
*/publicPriorityBlockingQueue(Collection<? extends E> c){// 初始化锁this.lock =newReentrantLock();// 初始化无数据等待的条件队列this.notEmpty = lock.newCondition();// 一个标记:如果不知道堆的顺序,则为truebooleanheapify=true;// true if not known to be in heap order// 一个标记:如果必须筛...
优先级队列不允许空元素,依赖自然顺序的优先级队列也不允许插入不可比较的对象。相比于PriorityQueue而言,PriorityBlockingQueue一个最大的优势是线程安全的。PriorityBlockingQueue是Java Collections Framework的一个成员。1. PriorityBlockingQueue的声明PriorityBlockingQueue的接口和继承关系如下...
Java中PriorityBlockingQueue的offer()方法 1. 方法offer(E e) PriorityBlockingQueue 的 offer(E e) 方法会将作为参数传递的元素 e 加入到此 PriorityBlockingQueue 中。由于此 PriorityBlockingQueue 是无界的,所以此方法永远不会被阻止。 语法: public boo
* of its elements are null*/publicPriorityBlockingQueue(Collection<?extendsE>c) {booleanheapify =true;//true if not known to be in heap orderbooleanscreen =true;//true if must screen for nullsif(cinstanceofSortedSet<?>) { SortedSet<?extendsE> ss = (SortedSet<?extendsE>) c;this.compa...
java.lang.Object java.util.AbstractCollection<E> java.util.AbstractQueue<E> java.util.concurrent.PriorityBlockingQueue<E> 参数类型 E - 此队列中保留的元素类型 实现的所有接口 Serializable, Iterable<E>, Collection<E>, BlockingQueue<E>, Queue<E> public class PriorityBlockingQueue<E> extends ...