Java
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Detailed explanation of Java HashMap, treemap and LinkedHashMap
Detailed explanation of Java HashMap, treemap and LinkedHashMap During the interview this morning, I asked about Java …… -
Java string format – string Use of format()
This article introduces Java string formatting - string The usage of format() is as follows: Formatting of general typ…… -
On Java custom annotations and obtaining annotations by reflection at runtime
Java custom annotation Java annotation is some meta information attached to the code, which is used for parsing and us…… -
Analysis of spring with ehcache instance
1 Introduction to ehcache Ehcache is a pure Java in-process caching framework, which is fast and lean. It is the defau…… -
Implementation of bubble sorting algorithm in Java
Bubble sort: That is, two adjacent elements are compared one by one according to the index. If it is greater than / le…… -
Two methods and comparison of Java reading map
preface There are many ways to traverse the map in Java. In this article, let's take a look at the two methods of read…… -
Parsing and generating XML documents using Dom4j in Java
1、 Foreword Dom4j is an excellent Java open source API, which is mainly used to read and write XML documents. It has …… -
Three methods of Java string segmentation (summary)
Recently, I encountered a small problem in the project. A string is divided into an array, similar to string STR = "AA…… -
Java scheduled task: use the Java timer class to realize the function of executing tasks regularly
1、 Overview To realize the function of executing tasks regularly in Java, two classes are mainly used, timer and Time…… -
Detailed explanation of 23 design patterns in java development (recommended)
Design patterns -- the basis of Reusable Object-Oriented Software Design pattern (design pattern) is a set of code des…… -
Method of verifying sqlmapper configuration file of mybatis using XSD (1)
Based on the refactoring of sqlsessionfactorybean, this article briefly reviews the operations: Create a new sqlsessio…… -
Java online book Mall (2) category module
This example shares the category module code of java online book Mall for your reference. The specific contents are as…… -
java. Lang. instrument agent details
java. Lang. instrument agent using java. Lang. instrument package is introduced in jdk5. Programmers can dynamically m…… -
User module of Java Web Book Mall Design (1)
This paper mainly analyzes the user module of the book mall, and the specific contents are as follows 1. User module r…… -
Java implementation simple stack code
This example shares the specific code of Java implementation simple stack for your reference. The specific contents ar…… -
Sequenize common operation details and example code
Sequelize common operation demo link query Statistics Maximum or minimum insert modify delete Thank you for reading, h…… -
Detailed explanation of the equals () and toString () methods in Java
The equals () and toString () methods in Java. Here is a small example to help you learn and understand this part of t…… -
Java online book Mall (5) shopping cart module 2
Let's see the effect first: settlement list. jsp servlet Dao Load multiple cartitems showitem. jsp -
Sequenize common operation details and example code
Sequelize common operation demo link query Statistics Maximum or minimum insert modify delete Thank you for reading, h…… -
In depth analysis of length and length () in Java
Before starting this article, consider the following question How to get the length of an array without using any ide …… -
Spring integrates quartz to realize timed task scheduling
Recently, the project needs to implement scheduled tasks, such as regularly calculating members' points, calling third…… -
Java infinite tree (recursive) super utility case
As follows: The above is all about the super practical case of Java infinite tree (recursion) brought by Xiaobian. I h…… -
Detailed explanation and example code of Java calling weather webservice
Small application of Java calling weather webservice No more nonsense, just post the code: CityReq. java WeatherWebSer…… -
Parsing and generating XML documents using Dom4j in Java
1、 Foreword Dom4j is an excellent Java open source API, which is mainly used to read and write XML documents. It has …… -
Implementation and callback of second-line payment function in Java wechat code scanning payment mode
1、 Preparatory work First, WeChat make complaints about the payment system itself, but its official documents are fra…… -
Dynamic update data using mybatis
When writing SQL using mybatis, you need to dynamically update the object data. The fields to be updated each time are…… -
What does the volatile keyword mean in Java
In java thread concurrency processing, there is a keyword volatile. At present, there is great confusion about the use…… -
Detailed explanation of four methods of generating and parsing XML documents in Java (Introduction + comparison of advantages and disadvantages + examples)
As we all know, there are more and more methods to parse XML, but there are four mainstream methods: DOM, sax, JDOM an…… -
Summary of Java list loop and map loop
Summary of Java list loop and map loop I made a summary of list and map. There is no technical content, so I should re…… -
Explanation of Java ArrayList implementation example
ArrayList overview: ArrayList is implemented based on array. It is a dynamic array. Its capacity can grow automaticall…… -
Java mybatis interceptor
Many java beginners don't know much about the mybatis interceptor. Here I'll sort out the next detailed explanation of…… -
The difference between start method and run method in java thread is introduced in detail
The difference between start method and run method in thread In the thread, if the start method calls the run method i……