Java
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Java does not print instances of array elements with circular statements
Examples are as follows: The above example of printing array elements without circular statements in Java is all the c…… -
Java intercepts string instances between specific two tags
If there is a string: higklmnopq The Java code is as follows: The above example of Java intercepting the str…… -
Comparison and difference between overloading and rewriting in Java
The difference between overloading and rewriting in Java First, let's talk about overloading (1) Method overloading is…… -
Summary of the differences between Java abstract classes and interfaces
Summary of the differences between Java abstract classes and interfaces Abstract class and interface are two mechanism…… -
Java efficiently prints an instance of a two-dimensional array (no recursion, no two for loops)
Print an element, do not let the loop variable i + +, and go out of the thinking formula (execute the loop body once, …… -
Spring + mybatis multi data source configuration implementation example
Recently, mybatis was used to configure multiple data sources. Originally, it was thought that a simple configuration …… -
Detailed explanation of spring MVC @ requestmapping annotation
introduction: Some time ago, the rest style was used in the project to develop the program, but when submitting data i…… -
Summary of network communication (TCP communication, UDP communication, multicast and NiO) of java basic knowledge
Summary of network communication based on Java In this article, we mainly discuss how to use java to realize network c…… -
Java simulation wechat grab red envelope example code
Java simply simulates the wechat red envelope grabbing function. In this example, 10 people grab a red envelope of 100…… -
Basic knowledge of JavaBean and common garbled code solutions
Basic knowledge of JavaBean and common garbled code solutions The garbled code problem should be a problem encountered…… -
Detailed explanation of split () method example of Java regular expression
This article illustrates the split () method of Java regular expressions. Share with you for your reference, as follow…… -
An example analysis of Chinese regular matching method in Java
This paper describes the method of Java regular matching Chinese. Share with you for your reference, as follows: 1. Ma…… -
Linux configuration JDK environment variables simple tutorial
preparation in advance Windows installation VMware installation Linux system jdk-8u60-linux-x64.0 tar. GZ (download li…… -
BigDecimal is used for precise operation in Java
First, let's look at the following code example: The operation results are as follows. zero point zero six nine nine n…… -
10 SQL errors easily made by Java programmers
Java programmers need to mix object-oriented thinking and general imperative programming methods when programming. Whe…… -
Java implementation of clockwise output spiral two-dimensional array method example
Recently, I saw an interesting logic algorithm problem, so I started to implement it. The title is to print out n * n …… -
Java JDBC connection database code and steps detailed and example code
Detailed explanation of JDBC connection database code and steps in Java JDBC connection database • create a program to…… -
[Java] BigDecimal implementation code for addition, subtraction, multiplication and division
java. math. BigDecimal There are four ways to make BigDecimal. Let me take a look at two of them first: The first: Big…… -
Inheritance of Java person, student and goodstudent and execution of constructor
There are three classes: person, student and goodstudent. Among them, student inherits person and goodstudent inherits…… -
Spring implements scheduled tasks with squertz
preface Speaking of scheduled tasks, the development partners must be familiar. Some things always need computers to c…… -
Implementation of SQL batch modification method in mybatis
In the project, I met the function that needs batch update. I originally wanted to use circular access to the database…… -
On java object-oriented (Abstract inheritance interface polymorphism)
What is inheritance? When the same attributes and behaviors exist in multiple classes, these contents are extracted in…… -
Summary of knowledge points of HashMap in JDK7
Several important variables in HashMap The default initial capacity must be the nth power of 2 The maximum capacity is…… -
Common exception classes in Java
1. java. lang.nullpointerexception We must often encounter this exception. The explanation of the exception is that "t…… -
Detailed explanation of Java data structure (linear table)
Chain storage and implementation of linear list Another way to realize the linear table is chain storage, that is, tho…… -
Java socket file transfer example code
Recently, I became addicted to learning socket, so I wrote a simple file transfer program. Client design idea: the cli…… -
Analysis of several cases of thread death in Java
The java thread conference ends in the following three ways, and is in a dead state after it ends 1. The execution of …… -
Java uses the nesting of conditional operators to complete the division of academic achievement
Title: use the nesting of conditional operators to complete this question: students with academic achievement > = 9…… -
Analysis of spring configuration file
Overview of spring configuration files brief introduction The spring configuration file is a "drawing" used to guide t…… -
Example of generating excel report file with Java
This simple operation will export data from the database, generate excel report and import Excel data into the databas…… -
Spring integrates the simple configuration method of quartz
However, it is rarely used directly in practical work. Spring quartz components are usually used, which can be automat…… -
Java image and byte array mutual conversion instance
Examples are as follows: File parsing: Fileimageoutputstream changed to fileoutputstream fileimageinputstream changed ……