Recent Posts
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Get char value in Java
How to get the utf8 code of a char in Java? This is a table at more values I tried character Getnumericvalue (a), but …… -
Unable to send email from Java EC2 server
Try to send mail from Amazon EC2 server using java code, but you will receive an exception – Exception in thread "main…… -
Java – why do I need to handle thread Exception of sleep()?
To get this code for compilation, I can: >Put my phone number thread Sleep () is placed in the try / catch block, o…… -
Java – how to simulate object getClass？
I'm developing a java project and want to create one for dto Write a unit test using the equals method Yes In the equa…… -
Java – the array finds the second highest value
I have an array of 10 integer values Now I want to find out Solution No, it's totally impossible If you do not view al…… -
An example of Java string explanation
1. Create object For string direct constants in Java programs, the JVM uses a string pool to store them. When a string…… -
Detailed introduction of static agent of agent role Java design pattern
Java dynamic proxy mode proxy: one role implements certain functions on behalf of another role. For example, the relat…… -
Detailed introduction to the use of Java input and output streams
1. What is IO@H_403_2 @ I / O operation in Java mainly refers to input and output operation using Java All Java I / O …… -
Detailed explanation of the conversion between list, set and array in Java
The conversion between Java list, set and array mainly uses Apache Jakarta common collections. The specific method is …… -
Deep understanding based on Java string “= =” and “equals”
Although the question about Java strings "= =" and "equals" is the most basic question in java learning, there are sti…… -
Several ways of connecting JDBC to access database
For example, there are the following access database student, table basic, and 6 records. Now their data is displayed …… -
Application analysis of network communication based on Java review
TCP connection Socket is the basis of TCP. In TCP connection, we will use ServerSocket and socket. After the client an…… -
In depth analysis of the address of Java objects
In traditional Java programming, you will no longer need to process Java objects or locations from memory. When you di…… -
Implementation of reading and writing TXT file in java development
Project structure: Operation effect: ======================================================== Here is the code: ======…… -
Specific steps for JDK environment variable configuration
1. My computer -- > properties -- > Advanced -- > environment variables 2. Configure user variables: -
Deep understanding of Java container classes
Java container classes include list, ArrayList, vector and map, hashtable, HashMap. ArrayList and HashMap are asynchro…… -
Detailed explanation of multithreading synchronization based on Java review
First, explain what synchronization is and what problems there are when it is not synchronized, and then discuss what …… -
Solution of importing data from database into excel using POI in Java
effect: When using, first import the POI package into the path of the project. Note that you only need to import the P…… -
In depth analysis of Java object replication
Java itself provides the ability of object replication There is a clone method in lang.Object class. This method is a …… -
Implementation of Java character encoding and decoding
Character set basis: Character set is a collection of characters, that is, symbols with special semantics. The letter …… -
Parsing how to get the bean configured in spring in Java
1、 What is spring? Spring is a lightweight inversion of control (IOC) and aspect oriented (AOP) container framework 2…… -
Operation summary of JDBC database
JDBC is a set of APIs that can execute SQL statements Because the traditional database operation requires programmers …… -
In depth analysis of two methods of binding SQL data source to JTable control in visual swing
In the visual swing of MyEclipse, there is a JTable control. JTable is used to display and edit general 2D cell tables…… -
Application introduction of Java class variable and member variable initialization process
1、 Class initialization For class initialization: class initialization is generally only initialized once. Class init…… -
Java method for replacing carriage return line feed in string
Replace with regular expression: Code snippet: String documentTxt = EntityUtils. toString(entity,"gbk");// Get data do…… -
Math. In JavaScript ceil() 、Math. floor() 、Math. Understanding of the three functions of round()
First, let's look at the definitions of three functions in javascript: the defining guide, 4th Edition. Math. ceil(): …… -
Java method for obtaining web container address
Tomcat local address e: \ soft4development \ apache-tomcat-6.0 eighteen System. getProperty("user.dir")//E:\soft4devel…… -
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How to use gridbaglayout, the most important layout manager in Java
Gridbaglayout is one of the most important layout managers in Java. It can make very complex layouts. It can be said t…… -
Java regular multi string matching replacement
It is also relatively simple to use in Java: 1 Compile the literal value of the regular expression to obtain the corre…… -
Sharing the steps of building Hadoop environment under Linux
1. Download the Hadoop package WGet http://apache.freelamp.com/hadoop/core/stable/hadoop-0.20.2.tar.gz 2、tar xvzf had…… -
Java array declaration, creation and initialization basis
Declaration method of one-dimensional array: type var []; Or type [] VaR; When declaring an array, its length (number ……