Java
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23 design patterns (11) Java policy pattern
The 23 design patterns of learning videos have been prepared for everyone, and the need to reply to the "design mode" …… -
Using java to understand SQL syntax (example explanation)
Select is equivalent to a for loop When executing a subquery, it can be understood as Obviously, it's one to many here…… -
Code analysis of solving perfect number in Java language
1. Concept First, let's understand what is a perfect number? Problem Description: if a natural number, the sum of all …… -
An example of orderly reading and writing of properties files in Java code
Recently, there was a requirement to read the contents in the properties file for users to modify. After modification,…… -
Detailed explanation of cross domain problems and precautions in handling Ajax requests in spring MVC
preface Sometimes when the front and back ends do data interaction, they will encounter annoying cross domain request …… -
Deeply understand the working principle and use examples of ThreadLocal
Introduction: This article has a brief code example to introduce the basic usage of ThreadLocal class. On this basis, …… -
Java static type checking sample code explanation
Explanation of static type checking and dynamic type checking: Static type checking: the process of verifying type saf…… -
Working principle and implementation code of AC automata in Java programming
Before reading this article, you can refer to the principle of multimode string matching algorithm and Java implementa…… -
A division exception of BigDecimal in Java
As follows: Note that in case of inexhaustible division, you need to specify the decimal precision and rounding mode o…… -
Complete instance of file upload and download tool class implemented in Java [automatic naming of uploaded files]
This example describes the file upload and download tool class implemented in Java. Share with you for your reference,…… -
Related operations between two large numbers in Java and BigInteger code examples
The related operations between two large numbers in Java and two pieces of BigInteger example code are as follows. Lar…… -
Analysis of common usage methods of StringBuffer in Java
StringBuffer When modifying strings, you need to use StringBuffer and StringBuilder classes. Unlike the string class, …… -
Java read and write Properties file to solve the problem of Chinese garbled code
Generally, the properties configuration file is used in spring projects, which is directly read by the framework. Of c…… -
Example of combining spring boot with rabbitmq to implement delay queue
background What is a delay queue? As the name suggests, a delay queue is a queue in which messages entering the queue …… -
Detailed explanation of reentrantlock and condition in Java multithreading
1、 Reentrantlock class 1.1 what is reentrantlock java. util. concurrent. The lock framework in lock is an abstraction…… -
Through Java util. Treemap source code to enhance the understanding of red and black trees
Before that, the programming tips have sorted out a lot of ideas and solutions about the red black tree of classical p…… -
Understanding dependency injection and control inversion in spring
Anyone who has studied the spring framework must have heard of the two concepts of IOC (inversion of control) and di (…… -
Detailed explanation of array copy (clone and array copy) code in Java
The copy of Java array is passed by reference, not the value of other languages. 1、clone protectedObjectclone() Throw…… -
Summary and explanation of display lock and built-in lock of Java multithreading
Summarize the display lock and built-in lock of multithreading Java has built-in locks implemented through synchronize…… -
Explain in detail how to transform an existing project into a spring boot project
Quickly create a springboot web project Take IntelliJ idea as an example: 1. First create a project, select spring ini…… -
Spring uses the configuration file and @ value to inject attribute value code
1 simple attribute value injection 2 inject complex attribute values using util tag summary The above is all about the…… -
Detailed explanation of Java programming post data request and receiving code
In the past two days, the HTTP server has made requests. After the client post data to the server, the server passes r…… -
On the difference between two assignment methods of string in Java
Similar to ordinary objects, create string objects through new. String str = new String("Hello"); The memory diagram i…… -
Java Multithread synchronizer code explanation
Synchronizer Solutions are provided for each specific synchronization problem. Synchronizers are objects that enable t…… -
Method of building file upload service by spring boot
This example shares the specific code of spring boot file upload service for your reference. The specific contents are…… -
What is the difference between Java and C + + objects created through new?
preface In this article, we will not talk about basic data types such as int, float and char, but use general classes …… -
Java map learning and code examples
preface Recently, in the University cloud platform project being done, I have more contact with map, and I am not very…… -
Examples of java file and byte conversion
Examples are as follows: The above example of java file and byte conversion is all the content shared by Xiaobian. I h…… -
Introduction to two methods of finding the image of binary tree by Java programming
Give a binary tree and find its image, as shown in the following figure: the binary tree on the right is the image of …… -
TF-IDF understanding and its Java implementation code example
TF-IDF preface Some time ago, I looked at the TF-IDF I had sorted out before and posted it on my blog. Knowledge needs…… -
Talk about synchronized in Java concurrency
1 Introduction Synchronized has always been a veteran role in multithreaded concurrent programming. Many people will c…… -
Double loop printing graphics for Java programming
Double loop prints right triangles with vertices on the top left: Prints a right triangle with vertices at the bottom ……