不同的是使用getFirst()如果此列表为空，会抛出NoSuchElementException 异常，而使用peekFirst()如果此...
Retrieves, but does not remove, the first element of this deque, or returnsnullif this deque is empty. C# [Android.Runtime.Register("peekFirst","()Ljava/lang/Object;","GetPeekFirstHandler")]publicvirtualJava.Lang.Object? PeekFirst(); ...
[Android.Runtime.Register("peekFirst", "()Ljava/lang/Object;", "GetPeekFirstHandler")] public virtual Java.Lang.Object? PeekFirst (); Devoluciones Object Implementaciones PeekFirst() Atributos RegisterAttribute Comentarios Las partes de esta página son modificaciones basadas en el trabajo crea...
deque.offer(55);intval = deque.peekFirst(); System.out.println("The first integer value is given as:"+val); System.out.println("The deque is given as:"+deque); } } 输出: The first integer value is given as:34 The deque is given as:[34, 43, 22, 55] 例子3 importjava.util.Ar...
PeekFirstByLookupId ITextSelection Synchronous Reading Notifications Status Bars Overview ITextSelection LINE_CLOSE message (Windows) Intsafe.h Functions MSMQQueue.PeekLastByLookupId Icons and Icon Overlays Text Object Model IFileViewerSite PROPID_MGMT_MSMQ_BYTES_IN_ALL_QUEUES Visual Basic Code Example: ...
Longfirst=mDrawTimes.peekFirst(); Longlast=mDrawTimes.peekLast(); if(first==null||last==null){ return0; } longdtime=last-first; returndtime/frames; } 代码示例来源:origin: Bilibili/DanmakuFlameMaster privatefloatfps(){ longlastTime=SystemClock.uptimeMillis(); ...
1. What does the peekFirst() method in Java's LinkedList do? Returns the first element Removes the first element Returns the last element Checks if the list is empty Show Answer 2. What will peekFirst() return if the LinkedList is empty? First element Last element Null Throws an ...
这二者都是取链表的第一个元素,但不删除,我于是在电脑上试了一下,发现链表中没有元素的时候二者都会返回null,所以他们区别在哪里呢写回答1回答 好帮手慕阿园 2020-06-09 已采纳 同学你好,这两个方法没有本质上的区别,都是获取列表的第一个元素,如果为空返回null 祝学习愉快 0 ...
Array_Deque.peekFirst() 参数:该方法不带任何参数。 返回值:该方法返回 Deque 的第一个元素。 以下程序说明了 Java.util.ArrayDeque.peekFirst() 方法:程序 1: // Java code to illustrate peekFirst() importjava.util.*; publicclassArrayDequeDemo{ ...
import org.apache.poi.util.IOUtils; import java.io.ByteArrayInputStream; import java.io.IOException; public class PeekFirstNBytesExample { public static void main(String[] args) { try (ByteArrayInputStream bais = new ByteArrayInputStream("Hello, POI!".getBytes())) { byte[] first5Bytes =...