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Technical Articles

Java

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

A deep understanding of HTTP persistent connections: Multiple request communication policy between Java clients and ESP32 servers

This article explores the implementation strategies and common challenges of sending multiple HTTP requests (i.e., HTTP persistent connections) in Java clients. The focus is on analyzing the impact of HTTP protocol version and server connection management (such as Connection: close header) on persistent connections, and provides code examples and debugging techniques to help developers understand and correctly handle HTTP communication between clients and embedded servers.

Sep 10, 2025 am 10:12 AM

Use oneOf in JSON Schema to avoid unnecessary enumeration errors

This article aims to help developers understand and resolve seemingly "false" enumeration errors that may occur when using JSON Schema's oneOf keyword for verification. We will analyze the causes of errors through a real case and provide corresponding solutions to ensure the validity and accuracy of JSON data.

Sep 10, 2025 am 09:42 AM

Generating suffix expressions from parse tree: Principles, implementations and common pitfalls

This article explores in-depth how to generate a suffix expression (Reverse Polish Notation) through parse trees. The core lies in the use of a post-order traversal algorithm, but the key to emphasizing that generating accurate suffix expressions is that the construction of the parse tree itself must correctly reflect the priority and binding of the operators. Through sample code and FAQ analysis, the article guides readers to understand and avoid conversion bias caused by tree structure errors.

Sep 10, 2025 am 09:39 AM

Optimization of Java code using conditional judgment: Improve readability and simplicity

This article aims to help Java developers optimize conditional judgment statements and improve the readability and simplicity of the code. By explaining how to use DeMorgan's law and invert the conditions, complex if statements are reduced to code that is easier to understand and maintain. This article will take into account specific examples to explore in-depth how to avoid empty if statements and provide best practices.

Sep 10, 2025 am 09:33 AM

Bukkit plugin development: a guide to correctly obtaining event triggering player names

In Bukkit plugin development, it is a common requirement to obtain player information from events. This tutorial will explore in-depth how to correctly obtain the player name that triggers the event in events such as BlockPlaceEvent to avoid the problem caused by misusing the Component object as a pure string. We will clarify the difference between Player objects and ItemStack display names and provide a simple and efficient implementation method.

Sep 10, 2025 am 09:27 AM