Recent Posts
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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 …… -
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 …… -
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…… -
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…… -
Java enumeration (enum) explains seven common uses
JDK1. 5 introduces a new type enumeration. Although it is a "small" function in Java, it brings "big" convenience to m…… -
Detailed explanation and example application of Java static proxy mode
Java static proxy mode Proxy mode: provides a proxy for other objects to control access to this object. The proxy mode…… -
java. lang.NoSuchMethodException: com. sun. proxy.$ Proxy58. List error resolution
java. lang.NoSuchMethodException: com. sun. proxy.$ Proxy58. List error resolution There are always some unexpected ex…… -
In depth understanding of fault handling tools for Java virtual machine
preface This article mainly introduces the fault handling tools of Java virtual machine. These tools include: JPS: vir…… -
Java 8 new feature method reference details
Java 8 new feature method reference For reference, we generally use it in objects, and the characteristic of object re…… -
Detailed explanation of several methods for Java spring controller to obtain request parameters
Several methods of obtaining request parameters by Java spring controller 1. Directly write the form parameters in the…… -
Detailed explanation of Java transactions and simple application examples
Simple use of Java transactions Java transactions will be asked in some interviews. During the interview, our first an…… -
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…… -
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…… -
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…… -
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…… -
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…… -
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…… -
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…… -
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…… -
Analysis on key points of Java multithreading
Multithreading details What are the similarities and differences between sleep method and wait method? Similarities: L…… -
How does Java delete elements during list or map traversal
There are many ways to traverse and delete the elements in the list or map, which will cause problems when used improp…… -
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 online book Mall (5) shopping cart module 2
Let's see the effect first: settlement list. jsp servlet Dao Load multiple cartitems showitem. jsp -
Java implementation simple stack code
This example shares the specific code of Java implementation simple stack for your reference. The specific contents ar…… -
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 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…… -
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…… -
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…… -
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 …… -
On the principle and implementation method of HTTP using basic authentication
1、 Basic certification overview In the process of communicating with the HTTP protocol, the HTTP protocol defines the…… -
Stored procedure call and running process of mybatis source code analysis
In this article, let's learn the usage and running process of mybatis calling stored procedures. First, we create a si…… -
Serialization and deserialization of Java objects
This example shares the serialization and deserialization of Java objects for your reference. The specific contents ar……