Java
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Java instantiation of an abstract class object method tutorial
preface Recently, in the process of learning, I found a problem. An abstract class cannot build the object through new…… -
Maven project refers to the method of external jar package
Problem Description: There is a Java Maven web project, which needs to introduce a third-party package GDAL Jar, but t…… -
Java binary tree path and code example
Given a binary tree, find the path where the sum of all nodes in all paths is equal to the given target value. A valid…… -
On the implementation process of Java garbage collection
This tutorial is to understand basic Java garbage collection and how it works. This is the second part of the garbage …… -
Analysis of inheritance test code in Java
Inheritance: you can construct a new class based on an existing class. By inheriting existing classes, you can reuse t…… -
Jcrontab simple introduction example details
This example shares a simple introduction to jcrontab for your reference. The specific contents are as follows Create …… -
Quickly understand NiO core components in Java
background knowledge Synchronous, asynchronous, blocking, non blocking First of all, these concepts are very confusin…… -
Maven project refers to the method of external jar package
Problem Description: There is a Java Maven web project, which needs to introduce a third-party package GDAL Jar, but t…… -
Four coding skills that Java programmers must know
If you were asked to optimize your Java code now, what would you do? In this article, the author introduces four metho…… -
Spring boot integrates Shiro and uses mongodb for session storage
preface Shiro is a permission framework. You can view its official website for specific use http://shiro.apache.org/ I…… -
Understanding of bio, NiO and AIO in Java
In the design of high-performance IO system, several terms and concepts often confuse us. The details are as follows: …… -
Bean life cycle of spring learning notes
preface In the last article, I mainly learned the configuration, injection and custom attribute editor of beans. Today…… -
Detailed explanation of log4j and AOP in spring MVC project
preface Log processing is a very important part of each project. Without logs, the controllability of the system will …… -
Analysis on the implementation of JSON view of custom spring MVC
scene Our team is now facing the problem of multi terminal data interface docking. In order to solve this problem, we …… -
Complete example of calculator function implemented by Java Swing
This article describes the calculator function implemented by Java swing. Share with you for your reference, as follow…… -
Explain how to create a simple web project with eclipse (Graphic)
Eclipse neon Chinese version; 1; Right click New -- > and select dynamic web project 2: Fill in the project name an…… -
Detailed explanation and code example of simpledateformat date format conversion in Java
Simpledateformat is a class that handles date format conversion. Official API_ 1.8 screenshot of simpledateformat inhe…… -
Detailed explanation of iterator and listiterator instances in Java
Scope and relationship of iterator and listiterator: (1) Iterator can be used to implement overlapping interface list,…… -
Java char simple tool class charutil sharing
The first article of the blog, about the simple operation of character char, Char, one of the basic data types of Java…… -
Examples of ANSI, Unicode, BMP, UTF and other coding concepts
1、 Foreword In fact, since I began to write java code, I have encountered numerous problems of garbled code and trans…… -
Java multithreading simulation red envelope grabbing function
Today, a friend asked me an interview question. Five people robbed five red envelopes, which can be robbed repeatedly.…… -
Implementation tutorial of spring boot custom starter
Spring boot uses starter to solve many configuration problems, but how does it solve these problems@ H_ 502_ 1@ Here i…… -
Spring boot admin method for managing monitoring data
The spring boot actuator can monitor all kinds of application information. The only disadvantage is that the returned …… -
Detailed explanation of Java function idioms
In Java programming, some knowledge can not be learned only through language specifications or standard API documents.…… -
Java implementation of batch writing data to MySQL
This article describes the method of batch writing data to MySQL in Java. Share with you for your reference, as follow…… -
Explain in detail how spring boot introduces external jar packages
Due to the requirements of the project, the interface of SMS verification code needs to be changed to Ali greater than…… -
23 design patterns (15) Java Interpreter pattern
23 design patterns Part 14: Java Interpreter pattern Definition: given a language, define a representation of its gram…… -
How to use propertysource annotation in spring boot
preface This article will focus on the use of the @ propertysource annotation in spring and how to load the specified …… -
Java optional class usage sharing
Optional is defined as a container class in Java, more specifically, a container with only one element. container obje…… -
Detailed explanation of session addition, deletion, modification and query operation code in Hibernate
Put the three state transition diagram here to facilitate the function of the analysis method: 1. Save() method of ses…… -
Example analysis of Java recursive algorithm
The basic idea of recursive algorithm design is: For a complex problem, decompose the original problem into several re…… -
Spring boot uses logback, logstash and elk to record log files
Under spring boot, try to log to logstash using log4j, and add log4j in Src / main / resources directory The custom ou……