add/offer:用于向队列中添加元素,add 在队列满时抛出异常,offer 在队列满时返回 false。 element/peek:用于获取队列的头部元素,element 在队列为空时抛出异常,peek 在队列为空时返回 null。 remove/poll:用于删除并返回队列的头部元素,如果队列为空则返回 null。这两个方法在功能上是相同的。 了解这些方法的区别和...
3. element() 和 peek() 的区别 element()和peek()用于在队列的头部查询元素. 与remove()方法类似 , 在队列为空时 ,element ()抛出一个异常 , 而peek()返回 null . 下面Java 中 Queue 的一些常用方法 : 其中put()和take()是BlockingQueue专属方法....
一、Queue 队列通常但不一定以 FIFO(先进先出)的方式对元素进行排序。 例外情况包括:优先级队列,根据提供的比较器对元素进行排序,或者元素的自然排序;以及LIFO队列(或堆栈),对LIFO进行排序(后进先出)。 无论使用哪种排序,队列的head 都是元素,可以通过调用remove()或poll()来删除。在FIFO队列中,所有新元素都将插...
Queue is empty" << endl; // Display error if the queue is empty return -1; } return arr[front]; // Returns the element at the front of the queue } void display() { if (isEmpty()) { cout << "Error: Queue is empty" << endl; // Display error if the queue is empty return...
QUEUE= Specifies the address of the queue head and tail. The head and tail of the queue must reside in consecutive fullword fields. This parameter is required. ELEMENT= Specifies the address of the element to be removed from the queue. If the address is not specified, the first element is...
[Android.Runtime.Register("remove", "()Ljava/lang/Object;", "GetRemoveHandler")] public virtual Java.Lang.Object? Remove(); Returns Object the head of this queue Implements Remove() Attributes RegisterAttribute Exceptions NoSuchElementException if this queue is empty Remarks Retrieves and ...
Java.Util.Concurrent Assembly: Mono.Android.dll Retrieves and removes the head of the queue represented by this deque (in other words, the first element of this deque). [Android.Runtime.Register("remove", "()Ljava/lang/Object;", "GetRemoveHandler")] public virtual Java.Lang.Object? Remove...
The KeRemoveDeviceQueue routine removes an entry from the head of a specified device queue.SyntaxC++ Копіювати PKDEVICE_QUEUE_ENTRY KeRemoveDeviceQueue( [in, out] PKDEVICE_QUEUE DeviceQueue ); Parameters[in, out] DeviceQueue...
DEVICE_QUERY_BUS_SPECIFIC_RESET_HANDLER Rückruffunktion DEVICE_REGISTRY_PROPERTY Enumeration DEVICE_REMOVAL_POLICY-Enumeration DEVICE_RESET_HANDLER Rückruffunktion DEVICE_RESET_INTERFACE_STANDARD Struktur DEVICE_RESET_STATUS_FLAGS Union DEVICE_RESET_TYPE-Enumeration DEVICE_TEXT_TYPE Enumeration DEVICE_USAGE_NO...
* prevents it from being added to this queue * 添加元素,如果添加成功则返回true,如果队列是满的,则抛出异常 */booleanadd(Ee);/** * Inserts the specified element into this queue if it is possible to do * so immediately without violating capacity restrictions. ...