Java 中的 PriorityBlockingQueue peek()方法 原文:https://www . geeksforgeeks . org/priorityblockingqueue-peek-method-in-Java/ 优先级阻塞队列 的 peek() 方法返回优先级阻塞队列的头处的元素。它检索 LinkedBlockingQueue 头的值,但不删除它。如果 Priorit 开发文
public int minRefuelStops(int target, int startFuel, int[][] stations) { Queue<Integer> pq = new PriorityQueue<>(Collections.reverseOrder()); int res = 0, n = stations.length; for (i = 0; startFuel < target; res++) { while (i < n && stations[i][0] <= startFuel) pq.offer...
下面的程序说明PriorityBlockingQueue的peek()方法。 示例1: // Java Program Demonstratepeek()// method of PriorityBlockingQueueimportjava.util.concurrent.PriorityBlockingQueue;publicclassGFG{publicstaticvoidmain(String[] args){// define capacity of PriorityBlockingQueueintcapacityOfQueue =5;// create objec...
Doing so may result in ClassCastException The queue retrieval operations poll, remove, peek, and element access the element at the head of the queue. The head of the PriorityQueue is the least element based on the natural ordering or the Comparator based ordering. If multiple objects are ...
peek():获取但不移除队列的头部元素。 size():返回队列的大小。 其他方法: 案例: import java.util.PriorityQueue; public class Main { public static void main(String[] args) { PriorityQueue<Integer> priorityQueue = new PriorityQueue<>(); priorityQueue.offer(3); ...
In Java, thePriorityQueueclass is implemented as a priority heap. Heap is an important data structure in computer science. For a quick overview of heap,hereis a very good tutorial. 1. Simple Example The following examples shows the basic operations of PriorityQueue such as offer(), peek(), ...
从上面代码可以看出,执行element()方法时,先是获取peek()方法的结果,如果结果是null,则抛出NoSuchElementException异常。 4. PriorityBlockingQueue的单元测试 PriorityBlockingQueue的单元测试如下: package com.waylau.java.demo.datastructure; import static org.junit.jupiter.api.Assertions.assertEquals; import static ...
本文整理了Java中java.util.concurrent.PriorityBlockingQueue.peek()方法的一些代码示例,展示了PriorityBlockingQueue.peek()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台,是从一些精选项目中提取出来的代码,具有较强的参考意义,能在一定程度帮忙到你。PriorityBlockingQueue.peek()方法的具体详情如下...
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 publicclassPriorityBlockingQueue<E>extendsAbstractQueue<E> implementsBlockingQueue<E>, java.io.Serializable { … }
Java.Util.Concurrent Assembly: Mono.Android.dll Retrieves, but does not remove, the head of this queue, or returnsnullif this queue is empty. C# [Android.Runtime.Register("peek","()Ljava/lang/Object;","GetPeekHandler")]publicoverrideJava.Lang.Object? Peek (); ...