51国产黑色丝袜高跟鞋,а√新版天堂资源中文8,www久久只有这里有精品

Article Tags

All
web3.0
- All
Backend Development
Web Front-end
Database
- All
- Mysql Tutorial
- navicat
- SQL
- Redis
- phpMyAdmin
- Oracle
- MongoDB
Operation and Maintenance
- All
- Mac OS
- Linux Operation and Maintenance
- Apache
- Nginx
- CentOS
- Docker
Development Tools
- All
- VSCode
- sublime
- notepad
- git
- composer
PHP Framework
- All
- Laravel
- YII
Common Problem
- All
Other
- All
- IIS
- SEO
- Premiere
Tech
- All
- AI
- It Industry
CMS Tutorial
- All
- WordPress
Java
- All
- javaTutorial
System Tutorial
- All
- Windows Series
- LINUX
- MAC
Computer Tutorials
Hardware Tutorial
Mobile Tutorial
- All
- Mobile News
- iPhone
- Android Phone
Software Tutorial
Mobile Game Tutorial

Home

Technical Articles

Java

javaTutorial

How to create a JAR file from the command line

To create a JAR file, first make sure that the Java class is compiled into a .class file, and then package it with the jar command. 1. Compile the Java file: javacMyProgram.java; 2. Create JAR using the jarcf command: jarcfmyapp.jarMyProgram.class; 3. If there is a package structure, retain the directory structure and execute: jarcfmyapp.jarcom/; 4. To make the JAR executable, create manifest.txt containing Main-Class:com.example.Main and ending with a newline, and run: jarcmfmanifest.txtmyapp.j

Aug 31, 2025 am 06:35 AM

Real-time response of Flink aggregated data in Spring Boot applications

This article explores how to integrate Flink in Spring Boot applications and solves the problem of how to get aggregated results in real-time and respond to APIs when Flink handles unlimited data flows. The article analyzes the characteristics of infinite data flow, proposes a solution to convert data sources into bounded data sources, and uses Kafka examples to illustrate how to specify the start and end offsets to achieve the processing of bounded data, so as to meet the needs of obtaining aggregate results in real time.

Aug 31, 2025 am 06:27 AM

Java Tutorial: Simulating random events, counting occurrences and result analysis

This tutorial aims to guide how to use Java to generate random integers within a specified range, simulate random events such as coin toss, and conduct detailed statistics and analysis of event results. The content covers custom random number generation methods, specific value counting methods, data storage strategies, and how to identify the most occurring values ??and the frequency of occurrence of specific categories (such as front and back of coin) to build a functionally complete random event simulation and analysis program.

Aug 31, 2025 am 05:51 AM

Azure Blob storage upload file failed: Troubleshooting and solution for permissions

This article aims to help developers resolve the "AuthorizationFailure" error encountered when uploading files using Azure Blob storage. By analyzing error information, it is clear that insufficient permissions are the main cause of the problem. The article will explain in detail how to solve the upload permissions problem by configuring the network settings of your Azure storage account, especially adding client IP addresses to the firewall whitelist, so as to successfully complete the file upload operation.

Aug 31, 2025 am 05:12 AM

Solution to get the JSP Session property as NULL value and share cross-browser data

This article aims to solve the problem of session.getAttribute() returning NULL value in JSP development, and provides a solution to share data between different browser sessions. We will explore the different scopes in JSP in depth, and focus on how to use Application Scope to pass data between different browser instances to ensure data consistency and user experience of web applications in various scenarios.

Aug 31, 2025 am 04:57 AM

Java code refactoring practice: eliminating duplicate logic through method extraction

This tutorial explores in-depth how to effectively eliminate code redundancy by encapsulating duplicate business logic into independent methods in Java development, thereby improving code maintainability and readability. For specific logical fragments shared across multiple methods, we will demonstrate how to extract and integrate them into relevant entity classes, such as adding the getRoleIds() method in UserEntity to achieve thin and efficient reuse of the code while enhancing the expressive power of the domain model.

Aug 31, 2025 am 04:24 AM

Logback log output control: In-depth understanding and disabling default console output

This tutorial aims to solve the problem that Logback is still accidentally outputting to the console when the ConsoleAppender is not explicitly configured. The core is to understand Logback's logger level and additionity attributes. By setting the additionivity of a specific logger to false, log events can be effectively prevented from propagating to the upper logger (usually the root logger with the console output configured by default), thereby achieving precise control of the log output target.

Aug 31, 2025 am 04:21 AM

Writing High-Performance File I/O Code in Java

Using buffering, NIO, batch processing, and appropriate APIs is the key to implementing Java high-performance file I/O. 1. Always use BufferedInputStream/BufferedOutputStream or BufferedReader/BufferedWriter for buffering to reduce system calls; 2. Use FileChannel in the java.nio package to perform efficient reading and writing; 3. Use FileChannel.map to create a MappedByteBuffer for super-large files or random access scenarios to achieve memory mapping; 4. You can use Files directly to use Files for simple operations.

Aug 31, 2025 am 03:26 AM

Lucene query skills: Use MatchNoDocsQuery to implement secure empty query

When building a Lucene query, avoid returning null and provide an "empty" query that does not match any document when a specific condition is not met (such as a security check failure). This tutorial will provide detailed information on how to achieve this using the MatchNoDocsQuery class provided by Lucene, so as to ensure the robustness of the application logic, avoid potential NullPointerException, and improve the readability and maintenance of the code.

Aug 31, 2025 am 03:21 AM

How to implement inheritance in Java

InJava,inheritanceisimplementedusingtheextendskeyword,allowingasubclasstoinheritfieldsandmethodsfromasuperclass,promotingcodereuseandestablishinghierarchy.1.Asubclassacquirespropertiesandmethodsofasuperclass,asshownwithDogextendingAnimalandinheriting

Aug 31, 2025 am 03:21 AM

Calculate the number of possible paths to JSON-driven questionnaire: Java recursive implementation

This article aims to provide a solution to calculate the number of all possible paths in a questionnaire based on JSON configuration using Java and recursive algorithms. We will dig deep into how to parse JSON structures and use recursive functions to iterate through all possible branches of answers, finally calculating the total number of different ways of completing the questionnaire. In addition, some considerations will be discussed when designing such questionnaire logic.

Aug 31, 2025 am 01:54 AM

Enter numerical range verification: Java implements a program with user input between 30 and 70

This article will guide you how to write a Java program that takes integers entered by the user and verify that the integer is in the range of 30 to 70. If the input is out of range, the program prompts the user to re-enter until the input is valid. The article will explain the code implementation in detail and provide precautions to help you understand the key points of loop control and input processing.

Aug 31, 2025 am 01:24 AM

Multi-field sorting of object lists using Java 8

This article describes how to use Java 8's Comparator interface and thenComparing method to sort a list containing custom objects in multiple fields. This focuses on how to implement complex sorting logic using method references when sorting rules depend on external objects (for example, years of employment calculated based on Employer objects). Through sample code and detailed explanations, help developers master flexible and efficient multi-field sorting skills.

Aug 31, 2025 am 12:45 AM

IntelliJ IDEA Gradle construction failure problem check and resolve

This article aims to help developers solve the construction problems encountered by IntelliJ IDEA in multi-module Gradle projects, especially when submodules fail to recognize dependent version variables defined in parent modules. Resolve build errors by removing unnecessary settings.gradle files from submodules, ensuring that Gradle correctly recognizes multi-module structures.

Aug 31, 2025 am 12:21 AM