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Network programming tutorial

Analyze how to obtain beans configured in Spring in Java

1. What is Spring? Spring is a lightweight inversion of control (IoC) and aspect-oriented (AOP) container framework. 2. How to obtain Spring-configured beans in the program? Method 1: Save the ApplicationContext object code during initialization: Copy the

2024-11-20
java.imageIo implementation code for adding watermarks to images

Copy the code as follows: package com.blogs.image;import java.awt.AlphaComposite;import java.awt.Color;import java.awt.Font;import java.a

2024-11-20
Java image compression implementation ideas and code

Java image compression code copy code is as follows: package com.img; import java.awt.Image; import java.awt.image.BufferedImage; import java.io.File; i

2024-11-20
Parsing Hibernate + MySQL Chinese garbled problem

If it is a Windows system, then the system's default local character set is gb2312. In order for the data table to also use the gb2312 character set, we need to write the SQL statement to create the data table like this: Copy the code The code is as f

2024-11-20
A brief analysis of the usage skills of Split function in Java

For example, if you execute: "2|33|4".split("|"), the result will be: ""2334 It's strange, but you can still know the reason after reading the API description. The java.lang.string.split split method splits a Split the st

2024-11-20
Use java code to retain the number of decimal points

Copy the code as follows: import java.text.*; import java.math.*; public class Test{ public Test(){double a=saveNumber(15.12312312,6);S

2024-11-20
Implementation code for deleting elements in JAVA collections

Often we want to delete certain elements from a collection. Some may write this. Copy the code as follows: public void operate(List list){ for (Iterator it = list.iterator(); it.hasNext();) {

2024-11-20
Sharing the differences between the new keyword and newInstance method in Java

newInstance() uses the class loading mechanism, and new creates a new class. From a JVM perspective, when using new to create a class, the class may not be loaded. But when using the newInstance() method, you must ensure that the class is loaded and the c

2024-11-20
Generics in Java programming ideas implement a stack class sharing

I think the author's writing is so good that I have to save it. Understanding of this example: //Type parameters cannot use basic types. T and U are actually the same type. //Every time new data is placed, it becomes a new top. Push the original top d

2024-11-20
JAVA TIMER simple usage learning

Timer has two modes for executing tasks. The most commonly used is schedule, which can execute tasks in two ways: 1: at a certain time (Data), 2: after a fixed time (int delay). These two You can specify the frequency of task execution in any of the follo

2024-11-20
Specific implementation of java swing standard dialog box

Copy the code as follows: package test001;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButt

2024-11-20
About various permutation and combination Java algorithm implementation methods

1. Use the binary state method to find permutations and combinations. This method is relatively easy to understand, but its operation efficiency is not high. For small data permutations and combinations, you can use the copied code. The code is as follows

2024-11-20
Solution to the problem of installing jdk library on Alibaba Cloud host

Today we will continue to install jdk on the Alibaba Cloud service. You need to check whether Alibaba Cloud is 32-bit or 64-bit. If it is 32-bit, download the 32-bit package. If it is 64-bit, download the 64-bit package. Mine is 64-bit. , at first I didn’

2024-11-20
A small example of removing spaces, carriage returns, line feeds, and tabs from strings in Java

Copy the code as follows: import java.util.regex.Matcher;import java.util.regex.Pattern;/*** @author lei* 2011-9-2*/public class StringUt

2024-11-20
Specific examples of Java+MySql image data saving and reading

1. Create a table: Copy the code as follows: drop table if exists photo;CREATE TABLE photo (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,name VARCHAR(10

2024-11-20

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