Java
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Analysis on key points of Java multithreading
Multithreading details What are the similarities and differences between sleep method and wait method? Similarities: L…… -
Tomcat error: HTTP status 500 (wrapper cannot find servlet class) solution
Tomcat reports an error: HTTP status 500 - wrapper cannot find servlet class HTTP Status 500 - Wrapper cannot find ser…… -
JQuery animation effect code sharing
1、 Show, hide The display method in jQuery is: Show(), the hiding method is: hide()。 When there are no parameters, i…… -
Explanation of java web file upload and download examples (cool file upload Technology)
1、 Course overview In the development of web application system, file upload function is a very common function. Toda…… -
Solution to the exception of double type operation result in Java
Question: When two double type values are operated, sometimes the result value is abnormal. For example: Output: 39.98…… -
Java spring 5 new features functional web framework detailed introduction
New features of Java spring 5 functional web framework give an example Let's start with some excerpts from the sample …… -
Explain the socket chat program based on Java – server (with demo)
Write before: Yesterday, I recorded the initial design of a socket chat program I took the time to write on my blog, w…… -
Book module of Java Web Book Mall Design (4)
This paper then studies the classification module of the previous book Mall for your reference. The specific contents …… -
On the similarities and differences between Java interface and C + + virtual class
C + + virtual classes are equivalent to abstract classes in Java. The differences between C + + virtual classes and in…… -
Detailed explanation of Java Web image upload and file upload examples
Java Web image upload and file upload Image upload is essentially the same as file upload, and the image itself is als…… -
Method summary of circular deletion of elements in list in Java
In my impression, there is a problem with the way to use the for loop to delete the elements in the list, but you can …… -
JavaMail tutorial creating mail (2)
The JavaMail API uses javax mail. Message class represents a message. Message class is an abstract class, so we need t…… -
Detailed explanation of the use of queue interface in Java
The queue interface is at the same level as list and set, and both inherit the collection interface. LinkedList implem…… -
Example of file upload and download of struts 2 in Java
File upload 1. How many small problems to deal with? 1. The file name is duplicate. Generally, a UUID can be generated…… -
Deeply understand the difference between I + + and + + I in Java
Today, let's talk about a misunderstanding about Java. I believe many friends who have just started learning java will…… -
Detailed introduction and implementation of Jenkins shutdown and restart
Jenkins shutdown and restart We use Jar - jar Jenkins War to start the Jenkins server, so how do we shut down or resta…… -
Java encryption algorithm — MD5 encryption and hash encryption algorithm with secret key source code
Java encryption algorithm -- MD5 encryption and hash encryption algorithm with secret key source code Recently, I lear…… -
Java XML error javax xml. transform. TransformerException: java. lang.NullPointerException
Java XML error javax xml. transform. TransformerException: java. Lang.nullpointerexception solution: Use java to opera…… -
The commonplace use of cookies in Java
1 what is a cookie The browser communicates with the web server using HTTP protocol. When a user sends a page request,…… -
Detailed explanation and difference between Java comparable and comparator
Detailed explanation and difference between Java comparable and comparator Java provides us with two comparison mechan…… -
Simple demo of timer and TimerTask in Java (shared)
Code: test class TimerTask task class The above simple demo of timer and TimerTask in Java is all that Xiaobian has sh…… -
Detailed explanation of Java polymorphism and common interview questions
Java polymorphism There are two types of polymorphism: (1) Compile time polymorphism (design time polymorphism): metho…… -
Java configuration MyEclipse Maven environment specific implementation steps
Java to configure MyEclipse Maven environment Although most of my projects have been moved to idea, I still habitually…… -
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……