Cuts the cake Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2202    Accepted Submission(s): 1354 Problem Description Ice cream took a bronze medal in the Beijing match. Liu sir is very very h…

一.需求:计算网页访问量前三名 import org.apache.spark.rdd.RDD import org.apache.spark.{SparkConf, SparkContext} /** * 需求:计算网页访问量前三名 * 用户:喜欢视频 直播 * 帮助企业做经营和决策 * * 看数据 */ object UrlCount { def main(args: Array[String]): Unit = { //1.加载数据 val conf:SparkConf = new Spa…

http://www.onjava.com/pub/a/onjava/2001/05/30/optimization.htmlComparing the performance of LinkedLists and ArrayLists (and Vectors) (Page last updated May 2001, Added 2001-06-18, Author Jack Shirazi, Publisher OnJava). Tips: ArrayList is faster than…

1.What is the 'instanceof' operator used for? stackoverflow的一个回答:http://stackoverflow.com/questions/7313559/what-is-the-instanceof-operator-used-for instanceof keyword is a binary operator used to test if an object (instance) is a subtype of a given…

Jodd是一个普通开源Java包.你可以把Jodd想象成Java的"瑞士军刀",不仅小,锋利而且包含许多便利的功能.Jodd 提供的功能有:  提供操作Java bean,  可以从各种数据源加载Bean,  简化JDBC的接连与代码,  剖析SQL查询,  处理时间与日期,  操作与格式化String,  搜索本地硬盘上的文件,  帮助处理Servlet请求等. 除此之外还包含一个很小,但实用的基于JSP的MVC框架. jodd使用示例: JODD中的时间操作类 jodd时间操作 i…

作者:RednaxelaFX链接:https://www.zhihu.com/question/21574535/answer/18998914来源:知乎著作权归作者所有.商业转载请联系作者获得授权,非商业转载请注明出处. 在进入正题前先得提一句:既然楼主提问的背景是"被面试问到",那很重要的一点是揣摩面试官提问的意图.按照楼主的简单描述,面试官问的是"Java的instanceof关键字是如何实现的",那要选择怎样的答案就得看面试官有怎样的背景.比较安全的应对方法…

本文内容: 20个最常见的JAVA面试问题(附答案) 13个单例模式JAVA面试问题(附答案) 说说JVM和垃圾收集是如何工作的(附答案) 说说如何避免JAVA线程死锁(附答案) Java中HashSet和HashMap的区别(附答案) Java面试中和Collection有关的10个问题(附答案) Java面试中和Spring相关的10个问题(附答案) 30个C/C++/Java面试中的常见算法问题 Stackoverflow中回复超过20的算法问题 面试攻略 微软面试技术题(附答案) 20个…

package com.common.util.portprinter; import java.io.IOException; import java.io.OutputStream; import com.common.util.PrinterParameterConf; /** * @author ChenMing * */ public class PortPrinterBase {     private OutputStream out;     protected int line…

Given a string s, partition s such that every substring of the partition is a palindrome. Return the minimum cuts needed for a palindrome partitioning of s. For example, given s = "aab", Return 1 since the palindrome partitioning ["aa"…

The inner class is a valuable feature because it allows you to group classes that logically belong together and to control the visibility of one within the other. However, it's important to understand that inner classes are distinctly different from…