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Technical Articles

Java

SnakeYAML processing YAML list object: Java class mapping depth analysis

In response to common problems encountered when using SnakeYAML to map complex list structures in YAML files to Java List objects, this article elaborates on the correspondence between correct Java class definition and YAML structure. Through specific examples, we guide developers how to create independent Java classes for each complex element in the list and ensure that the YAML indentation matches the Java object hierarchy, thus achieving efficient and error-free data conversion.

Sep 10, 2025 am 11:42 AM

Detailed explanation of integer data type overflow mechanism and two's complement code in Java

This article explores the mechanism of integer data type overflow in Java in depth. By analyzing the two's complement representation in detail, the storage method of negative numbers in computers and their arithmetic unity with positive numbers is revealed. The article explains how "loop" overflow occurs when the value exceeds the data type capacity, and provides specific examples and calculation methods to help readers accurately predict the overflow results, thereby avoiding potential program errors.

Sep 10, 2025 am 11:36 AM

Correct implementation and optimization of ARGB pixel value bit operation in Java

This article aims to explore in-depth the correct way to deal with ARGB pixel values ??in Java, especially common pitfalls and solutions when decoding and combining them through bit operations. We will focus on how to simplify operations using the Java standard library's java.awt.Color class, and how to avoid symbol expansion issues through bitmask (&0xFF) when performing displacement operations manually to ensure the accuracy of RGB channel values. In addition, the article will also provide optimization strategies for image pixel traversal to improve the robustness and readability of the code.

Sep 10, 2025 am 11:33 AM

Generate titles that accurately express the subject of the article File path problems and solutions in Java JUnit test

This article conducts an in-depth analysis of the common "file not found" problem in Java JUnit tests, even if the file actually exists. Through the case, the problems caused by the differences in JUnit tests and the program runtime working directory are explained in detail, and an effective solution to modify the JUnit test working directory is provided to help developers avoid such problems and ensure the accuracy and reliability of the test.

Sep 10, 2025 am 11:21 AM

A practical guide to converting PostgreSQL stored procedures to Spring Boot native queries

This article aims to guide developers on how to convert PostgreSQL stored procedures into native SQL queries in Spring Boot applications. By analyzing a specific stored procedure, we will demonstrate in detail how to build equivalent SQL queries and introduce two main parameter mapping methods in Spring Data JPA @Query annotation: named parameters and positional parameters to implement the replacement of stored procedures.

Sep 10, 2025 am 11:15 AM

Java: Method for efficiently extracting word specified length in string

This article details how to efficiently extract words of a specified length from an input string in Java. By decomposing sentences into word arrays using the String.split() method, and combining filter() and toArray() operations of the Java 8 Stream API, a concise, readable and powerful solution can be implemented to easily filter out words that meet specific length requirements.

Sep 10, 2025 am 11:09 AM

How to reference a local version of a dependency project in a Gradle project

This article describes how to reference locally developed dependent projects in Gradle projects to avoid the tedious process of releasing a new version to be used in the main project after each modification of the dependent project. Local dependencies can be easily implemented, thereby improving development efficiency by configuring the mavenLocal() repository and using the publishToMavenLocal task.

Sep 10, 2025 am 10:57 AM

307 temporary redirects for processing POST requests in Rest Assured

This article aims to resolve the 307 temporary redirect problem that Rest Assured encounters when processing POST requests. Since Rest Assured does not automatically follow 307 redirects for POST requests by default, we will dig into its redirection mechanism and provide a manual processing solution to ensure that the POST request is completed correctly by capturing the Location response header and resending the request to a new address.

Sep 10, 2025 am 10:48 AM

Tutorial for receiving multiple query parameters with different parameter names

This article describes how to receive multiple query parameters with different parameter names in the RESTful API. For two common usage scenarios, we explore how to receive these parameters through class objects and HashMap/MultiValueMap, and discuss alternatives to using JWT for authentication.

Sep 10, 2025 am 10:45 AM

Selenium page loading blank: implementation of global retry mechanism

This article describes how to implement a global page load retry mechanism in the Selenium test framework to deal with low-speed or unstable environments that cause page loading blanks. Through dynamic functions combined with page loading strategy and document status check, you can automatically refresh and try again when the page loads fail, improving the stability and reliability of the test.

Sep 10, 2025 am 10:36 AM

Detecting Apple Silicon (M1) and Intel processors in Java

This article describes how to distinguish between Apple Silicon (M1) and Intel processors in Java applications. Since the os.arch property returns the JRE architecture, not the underlying operating system architecture, processor information needs to be obtained through specific methods provided by the operating system. This article provides example code to achieve this on Windows and macOS systems.

Sep 10, 2025 am 10:30 AM

Run GUI application on the server on the client

This article explores how to run a server-side hosted GUI application on a client machine. The core solution is that the client downloads the JAR file of the GUI application from the server and executes the file locally through the Java virtual machine. The tutorial will provide detailed Java implementations of the download and execution process and provide key considerations to ensure that such applications are deployed and run safely and reliably.

Sep 10, 2025 am 10:27 AM

JNA Integration Native Library: Best Practices for Handling Complex Structures and Unions

This article explores in-depth how to correctly map complex structs and unions in C language when interacting with native libraries using JNA. The core is that JNA requires that all Java classes representing C structures or unions must inherit com.sun.jna.Structure or com.sun.jna.Union and correctly define the field order. The article provides two solutions: direct JNA mapping and "friendly" object conversion, and highlights key considerations such as memory management, field order and union processing, aiming to help developers build robust JNA integrations.

Sep 10, 2025 am 10:24 AM

How to import data and merge streams to existing Flux in Reactor

This article aims to dive into how to effectively introduce new data and merge it with existing streams in the Reactor framework, especially in the face of existing Flux provided by external libraries. The article will clarify the limitations of "transmitting" directly to Flux, focusing on strategies to create new data streams and merge using operators such as Flux.merge, and highlighting key considerations and solutions for dealing with one-time subscription to Flux.

Sep 10, 2025 am 10:18 AM