Java
-
Java uses POI to parse excel and obtain instances of all cell data
1. Import POI related jar packages org. apache. poi jar 2. Code example The above example of Java parsing excel with P…… -
On the difference between static and non static in Java
On the difference between static and non static variables 1. Static modified variables are called class variables, glo…… -
Detailed explanation of the selection of map traversal mode in Java
1. Description For the traversal of map in Java, many articles recommend using entryset, which is much more efficient …… -
Java implementation of guessing numbers games
Java implementation of the number guessing game, randomly given a number, guess the size until it is correct Another m…… -
Java random number production algorithm example
Java provides math The random () function returns a random number of double type, and there is also the random class i…… -
Two methods of generating random string in Java
This example shares the specific code of generating random string in Java for your reference. The specific contents ar…… -
Export excel tool class instance implemented by Java
This paper describes the export excel tool class implemented in Java. Share with you for your reference, as follows: E…… -
Quickly create list and map instances with initial values in Java
Initialize a list and map object and add values as follows: This operation can also be implemented with the following …… -
Detailed explanation of object-oriented programming ideas and object examples in Java language
When beginners learn Java, object-oriented is difficult to understand, so today Xiaobian will put this idea for you to…… -
Java continue break to make a simple chat room program
Java continue break makes a simple chat room program to shield uncivilized language and display the chat time of each …… -
Java implementation of four mixed operation code examples
Using the stack, you can handle the operation priority. Use natural four arithmetic expressions, such as 4 + (3 * (3-1…… -
Java implementation of file encryption and decryption function example
This article describes the encryption and decryption function of Java implementation files for your reference, as foll…… -
Springcloud practical tips: zuul’s path matching
Whether we use the configuration method of traditional routing or service routing, we need to define a matching expres…… -
Fully understand CAS mechanism in Java
preface When I saw the Java lock mechanism, I accidentally saw the word CAS. Then I looked for CAS in Baidu. I read ma…… -
Analysis of common methods of appending content to the end of file in Java
This article describes the common methods of appending content to the end of the file in Java. Share with you for your…… -
Kryo serialization and deserialization usage examples
Kryo is a fast and efficient Java object graphics serialization framework, which is characterized by performance, effi…… -
Kryo framework usage code example
Source of kryo framework has been moved to https://github.com/EsotericSoftware/kryo , enter this page, and then click …… -
Implementation methods of several common comparators in Java
In Java, the sorting of object arrays is often involved, so it involves the comparison between objects. Generally, the…… -
Mybatis L2 cache implementation code
L2 cache needs to be manually configured and enabled, as follows: Set enable L2 cache / mybatis02 / config / mybatis-c…… -
Learning and using servlet listener (3)
This article shares the specific learning contents of servlet listener for your reference. The specific contents are a…… -
Common problems based on Multithreading concurrency (detailed explanation)
I. overview 1.volatile Ensure that once the shared data is modified, it will be synchronized to the shared memory (hea…… -
Implementation code of readwritelock read-write separation of Java multithreading
In multithreaded development, there is often a situation where we want to separate reading and writing. For the read a…… -
Implementation method of spring boot after starting the project
preface We sometimes do other things (such as importing data scripts) after the web project is started. Let's talk abo…… -
An in-depth analysis of the advantages of HBase
HBase is a NoSQL database running on Hadoop. It is a distributed and scalable big data warehouse. In other words, HBas…… -
Explain in detail how to write and run spark applications in Java
We first put forward such a simple requirement: Now we need to analyze the access log information of a website and cou…… -
Explain the implementation mechanism of spring MVC dispatchservlet in detail
In spring, contextloaderlistener is just an auxiliary class. When the web container starts, it finds and creates a web…… -
Usage of mongodb in spring boot project
preface As we all know, MySQL database is easy to use, but the amount of data is more than ten million. It is very pai…… -
How to use transactionattributes in spring configuration
Recently, I encountered this problem. When using the jpatemplate provided by spring for query, if the amount of data e…… -
Thoughts on Java enterprise project development
What is enterprise project development "Enterprise level project", enterprise level project development, and Java is a…… -
Java is a simple instance of reading and outputting from a file
Input with scanner and output with printstream Function: from in Txt read in and output to out txt code: Same as below…… -
Struts 2 static resource mapping code example
In the struts 2 framework, there are some common static content that it needs, such as JS files and some CSS files. Wh…… -
Solve problems encountered in Java wrapper class comparison
preface This article mainly introduces the solutions to some problems encountered in the comparison of Java packaging ……