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User login registration instance based on Io Version (Java)
What I learned today is the user login and registration function. 4 packages: itcast. cn. User package user Java user …… -
Detailed example of synchronize function in Java
Detailed example of synchronize function in Java If the member function of a class in Java is decorated with synchroni…… -
Code analysis of RTTI and reflection mechanism in Java
RTTI, namely run time type identification. Runtime type recognition is a very useful mechanism in Java. In Java runtim…… -
Default methods instance resolution
This is how the Oracle official website introduces the default method. Using the default method can add new functions …… -
Implementation of queue source code based on zookeeper
Implementation principle The first in first out queue is the most commonly used queue. Using zookeeper to implement th…… -
Detailed explanation of abstract factory pattern example of Java design pattern
This paper describes the abstract factory pattern of Java design pattern. Share with you for your reference, as follow…… -
Analysis of basic concepts of java thread safety
A preliminary understanding of java thread safety. Generally speaking, java thread safety refers to a feature of Java …… -
What you need to know about java reflection mechanism
As we all know, in order for Java programs to run, Java classes must be loaded by the Java virtual machine. Java class…… -
Graphic tutorial of Java environment configuration (recommended)
The first step of the new java course this year is... Configuring the environment Start with the Java environment conf…… -
Signature acquisition based on wechat signature (example explanation)
The signature algorithm shared by wechat is also written on wechat, The main reason is that the calling interface need…… -
Three construction methods of Java multithreading
Three construction methods of Java multithreading Inherit thread class to create thread class Thread class already inh…… -
Hibernate one to many mapping configuration method (sharing)
Take the company and employees as an example: the company is one, and there are many employees The first step is to cr…… -
Analysis of DLL file dynamic loading method in Java Web project (detailed steps)
I believe that many Java friends have experienced calling C or C + + methods by calling JNI in Java, so how to realize…… -
Example of integer product calculation function of Java analog computer
This paper describes the integer product calculation function of Java analog computer. Share with you for your referen…… -
RxJava2. x+ReTrofit2. X multi thread download file sample code
Write before: Received the company's demand: to do an APK upgrade function, the principle is actually very simple. Bai…… -
Java project security processing method
1、 There is a problem with parameter display in URL. Solution: 1. The normal get request is modified to post request …… -
Integration of struts + Spring + Hibernate Framework
Prepare the Lib package combined with the three frameworks The steps of combining spring 3 with struts 2 are as follow…… -
How to use function reference in java8 learning tutorial
preface In the last article, we explained how to define and use lambda expressions with examples, and the special spec…… -
Spring boot + mybatis multi data source switching (example explanation)
Since the company's business is divided into multiple databases, colleagues will call multiple databases when developi…… -
How to use lambda expressions in java8 learning tutorial
preface In the previous article, we introduced the syntax of lambda expressions, the usage scenarios of lambda express…… -
A simple example of implementing skip list in Java
Jump linked list is a randomized data structure. Based on parallel linked list, its efficiency can be compared with bi…… -
[Java IO stream] example explanation of byte stream and character stream
Byte stream and character stream There must be read and write operations for files. Read and write correspond to input…… -
What is null in Java and matters needing attention in use
1. Null is neither an object nor a type. It is only a special value. You can assign it to any reference type, or you c…… -
Java file directory read write delete operation detailed implementation code
I Get the information entered by the console user It can return the information entered by the user. The disadvantage …… -
Example explanation based on Java ActiveMQ
Jar package to be imported: jms-1.1. jar activemq-all-5.15. 0.jar producer consumer The above example explanation base…… -
Java uses POI to generate excel table instance code with linkage drop-down box
No more nonsense. I'll post the code directly to you. The specific code is as follows: summary The above is what Xiaob…… -
Implementation of complex mail sending function based on JavaMail
In the previous article, java mail sending based on JavaMail: simple mail sending explained the basic protocol of mail…… -
Java sorting algorithm_ Select sorting (example explanation)
Selective sorting is a very simple sorting algorithm. We can know from the literal meaning, Selection is to select the…… -
Detailed explanation of image factory in Java design pattern
1、 Concept Provides an interface to create a series of related or interdependent objects without specifying their spe…… -
Java regular replacement mobile phone number code example
In our daily life, we often encounter replacing the 4-7 bit string of a mobile phone number with an asterisk "*" with …… -
Java uses divide and conquer algorithm to realize sorting number index function example [binary search]
This example describes how Java uses divide and conquer algorithm to realize sorting number index function. Share with……