Article Tags
Article Tags
Practical Guide to Select Element Operations in Selenium Automated Testing
This tutorial details how to effectively manipulate HTML drop-down menus in Selenium automated tests. The article first explains the basic usage of Selenium Select class, including selecting options by value, index and visible text. Then, it provides an in-depth analysis of common problems that may be encountered in actual operations when elements cannot be interacted or cannot be found, and provides two solutions: using Thread.sleep() for simple waiting (not recommended) and using WebDriverWait to implement intelligent explicit waiting to ensure the robustness and reliability of the script.
Jan 01, 2026 am 10:48 AM
Java Stream implements CSV file data merging tutorial
This tutorial shows you how to use Java Stream to combine data read from multiple CSV files. The emphasis is on maintaining read order, and an example based on city and country data is provided to show how data association and merging can be achieved through forEach and filter operations.
Jan 01, 2026 am 10:36 AM
Java Eclipse plug-in development: detecting and tracking 'dirty' files in projects
This article will delve into how to effectively detect and track "dirty" files that have been modified but not yet saved in the project during Eclipse plug-in development. We will focus on using the IResourceChangeListener and IResourceDelta mechanisms to monitor workspace resource changes, identify file content modifications, and discuss how to build a custom file status tracker to manage the "dirty" and "saved" status of files.
Jan 01, 2026 am 10:33 AM
Java tutorial: Implement digital sequence filtering and specified length output
This tutorial is designed to guide developers how to use the Java programming language to generate a number sequence starting from 1 based on a specified number n input by the user. This sequence will strictly exclude all integers containing the number '1' and ensure that the final number of output numbers is exactly n. The article will introduce two core implementation methods: a simple solution based on string conversion and an efficient solution based on mathematical operations, and provide detailed code examples and logical analysis.
Jan 01, 2026 am 10:18 AM
A professional guide to implementing audio loop playback in Java
This article details the correct way to implement audio loop playback in Java. We will abandon the deprecated sun.audio class in favor of the standard and powerful javax.sound.sampled package. The tutorial will cover how to load audio files, use the Clip interface to achieve infinite loop playback, and further explore how to manage audio playback in a separate thread to ensure that the background music can continue to run even if the main thread ends, providing complete code examples and precautions.
Jan 01, 2026 am 10:03 AM
Elasticsearch multi-field and conditional sorting: Painless script implementation guide
This article deeply explores the implementation method of multi-field sorting based on complex business logic in Elasticsearch. Through the Painless script, we show how to flexibly adjust the sort order of the createdAt field according to the presence or absence of the tags field in the document, that is, those with tags are sorted in ascending order of createdAt, and those without tags are sorted in descending order of createdAt, thereby meeting advanced customized sorting requirements.
Jan 01, 2026 am 09:33 AM
Java Card Game: Tutorial on Implementing Interactive Card Cutting Function
This tutorial provides detailed guidance on how to implement an interactive card cutting function in Java. The article will analyze common programming errors, such as improper array modification, inconsistent deck sizes, and lack of user input validation, and provide an optimized solution. By explaining the code implementation step by step, including the creation of decks, selection of card cutting points, division and reorganization of decks, it aims to help developers build robust and flexible card game logic.
Jan 01, 2026 am 09:18 AM
Solving the NoSuchMethodError of JPanel adding components in ABCL
This article aims to solve the NoSuchMethodException encountered when adding components to JPanel when building a Java GUI using ABCL (Armed Bear Common Lisp). When overloads exist for a Java method, ABCL's jcall may not automatically select the correct signature. The tutorial will elaborate on how to explicitly specify method signatures through jclass and jmethod to successfully call specific overloads and ensure that components can be added to the container correctly.
Jan 01, 2026 am 09:09 AM
Resolving Maven multi-module project parent POM not found error: local installation strategy
In Maven multi-module projects, when trying to build submodules independently, you often encounter the error "Parent POM not found" even if relativePath has been configured. This is usually caused by Maven being unable to resolve the parent POM in the local or remote repository. The core solution is to use the mvn install -N command to install the parent POM to the local Maven repository before building the submodule to ensure that it can be correctly referenced by the submodule.
Jan 01, 2026 am 08:45 AM
ActiveMQ connection event notification: Monitor broker status using Advisory Topics
This article details how to use the Advisory Topics function of Apache ActiveMQ to enable Java applications to monitor the connection creation, closing and other key events of the ActiveMQ broker in real time. By subscribing to a specific Advisory Topic, developers can receive and process notifications such as connection status changes, consumer/producer activities, temporary destination life cycles, etc., thereby achieving more granular monitoring and management of the message broker.
Jan 01, 2026 am 08:03 AM
Java NIO non-blocking read and write operation optimization and common pitfalls
This article takes an in-depth look at the common "write operation blocking" problem in Java NIO non-blocking read and write operations, and analyzes how improper SelectionKey management (such as incorrect use of key.cancel() and continuous registration of OP_WRITE) can cause the server to deadlock during repeated connections. The article provides optimized code examples, emphasizes the importance of dynamically adjusting the SelectionKey interest set, and strongly recommends using mature NIO frameworks such as Netty in production environments to avoid the complexity of native NIO.
Jan 01, 2026 am 07:45 AM
Implement complex conditional queries based on field values in Elasticsearch
This article aims to deeply explore how to implement dynamic conditional queries based on field values in Elasticsearch. We will use a specific scenario to demonstrate how to use Elasticsearch's bool query combined with clauses such as must, should, match_phrase, and range to build query logic as flexible as the CASE WHEN statement in SQL, thereby applying different filtering conditions based on different values of specific fields. The article will also provide a complete DSL example and mention integration ideas with Spring Data Elasticsearch.
Jan 01, 2026 am 07:09 AM
Guide to handling decimals in JavaScript numerical calculation results
This tutorial details various ways to handle the decimal part of calculation results in JavaScript. In response to the problem that floating-point calculations may produce lengthy decimals, this article will deeply explore the usage scenarios, characteristics and code examples of core functions such as Math.floor(), Math.round(), parseInt(), and toFixed(), aiming to help developers accurately control the display format of numerical values and ensure that calculation results meet expectations.
Jan 01, 2026 am 06:57 AM
Java Files.exists(Path) cross-platform behavior differences and testing practice guide
This article explores the case where the Java Files.exists(Path) method exhibits behavioral differences on Windows and Linux systems, and provides an in-depth analysis of the root cause behind it caused by test residual files. The article emphasizes the accuracy of relative path resolution, file system interaction, and provides best practices for correctly managing temporary files and directories in unit tests to avoid such cross-platform environment issues and ensure consistent code behavior and robustness of tests.
Jan 01, 2026 am 06:33 AM
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