Java
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Java quicksort (instance)
Quick sort ---------------------------------------------------------------------- thought As shown in the figure above…… -
Detailed explanation of Java synchronization function code
summary The lock of the synchronization function is this, and the lock of the static synchronization function is the b…… -
Java map stores the array and takes out the value code
There are four main methods to obtain the value of map. These four methods are divided into two categories. One is to …… -
Analysis of internal storage mode of map in Java
Map, that is, map, also known as key value pair, has a key and a value. For example, in groovy language, def map = ['n…… -
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…… -
DES encryption and decryption tool class instance implemented in Java
This article describes the DES encryption and decryption tool class implemented in Java. Share with you for your refer…… -
Java implementation to construct infinite hierarchical tree menu
Here, let's talk about how the background Java constructs a multi tree, so that the foreground can receive data and re…… -
Detailed explanation of Java data overflow code
Java is a relatively safe language, so how does it handle data overflow? Look at a piece of code, The result of the ru…… -
Comparison of two object attributes based on Java
There are two ways to compare two objects: 1. Case 1: when you just judge whether two objects are equal, you just need…… -
Example of n * n matrix evaluation and inverse matrix algorithm implemented in Java
This paper describes the n * n matrix evaluation and inverse matrix algorithm implemented in Java. Share with you for …… -
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……