Article Tags
Article Tags
Operating the Ubuntu system file upload dialog box in Selenium
This article explains how to handle file upload dialogs in Ubuntu systems using Selenium. The core is to send the file path directly to the file upload element on the web page, avoiding the direct operating system dialog box. At the same time, you need to pay attention to the correctness of the file path and avoid manually triggering the file upload dialog box.
Nov 29, 2025 am 04:27 AM
Optimize the performance of block detection and light source judgment in Minecraft Forge 1.19.2
This article aims to provide strategies for optimizing the block detection and light source judgment logic around the player during the development of the Minecraft Forge 1.19.2 module. In view of the performance problems caused by repeatedly obtaining block status and brightness information in common codes, we will discuss how to improve the readability, maintainability and CPU efficiency of the code by introducing local variables, clearly separating logical judgments, and using data structures to simplify the code.
Nov 29, 2025 am 04:18 AM
Java array sorting and index output: implementing test score sorting table
This document is intended to guide developers on how to sort array elements in Java programs and output the sorted results in tabular form while retaining the original index information. By modifying the existing selectionSort method and combining it with the index array, the test results input by the user are sorted and output, ensuring the accuracy and readability of the output results.
Nov 29, 2025 am 04:03 AM
Regular expression verification in Java: Analysis of differences between online tools and practical applications
This article takes an in-depth look at common reasons why regular expressions behave fine in online tools but fail to validate in Java applications. The core problem lies in improper scoping of the alternating group (|) in regular expressions, and the behavior of the Java String.matches() method that requires matching of the entire string. The article provides revised regular expressions and gives code examples to correctly implement date and time validation in Java, emphasizing the importance of precise grouping and understanding API behavior.
Nov 29, 2025 am 03:45 AM
Exact replacement of angle brackets for array pattern in Java string using regular expression
This tutorial details how to use regular expressions to exactly replace angle brackets < > in a specific pattern array with square brackets [ ] in a Java string. By constructing a regular expression array with a capture group, combined with the replacement string array[$1], it is possible to efficiently convert only the type declaration of the array prefix while preserving the type name.
Nov 29, 2025 am 03:33 AM
Resolve the issue of Spring cross-domain resource sharing policy reported by Checkmarx as being too loose
This article aims to address an issue in Checkmarx scan reports regarding Spring application Cross-Origin Resource Sharing (CORS) policies that are too lenient. By analyzing the use of the @CrossOrigin annotation, it explains why wildcard configuration can lead to security risks, and provides sample code and precautions on how to configure a whitelist to limit the domains that are allowed to access resources, helping developers improve application security.
Nov 29, 2025 am 03:30 AM
How to mock a class or method using Mockito in Java?
AddMockitodependencyviaMavenorGradle.2.Createmockinstancesusing@MockorMockito.mock().3.Definemethodbehaviorwithwhen().thenReturn()orthenThrow().4.Verifyinteractionsusingverify().Thisisolatescode,replacesdependencies,andensuresfast,reliableunittests.
Nov 29, 2025 am 03:19 AM
How to use virtual threads (Project Loom) in modern Java
VirtualthreadsinJava21 simplifyhigh-throughputconcurrentprogrammingbyenablinglightweight,per-requestthreading;theyarecreatedviaThread.ofVirtual()orExecutors.newVirtualThreadPerTaskExecutor(),idealforI/O-boundtasks,andeliminatemanualthreadpoolmanageme
Nov 29, 2025 am 03:13 AM
How to use the Stream API in Java 8?
Java 8's StreamAPI provides a powerful and expressive way to process sequences of elements in a functional style. 1. Streams can be created from collections, arrays, Stream.of() or builders; 2. Intermediate operations such as filter, map, sorted, etc. are evaluated lazily and return new streams; 3. Terminal operations such as forEach, collect, reduce trigger execution and produce results; 4. Example: Convert elements with a length greater than 4 in the name list to uppercase and sort them, completed through chain calls; 5. Support parallel streams to improve performance.
Nov 29, 2025 am 03:06 AM
What is the Java platform module system (JPMS)?
JPMSsolvesmodularityissuesinJavabyintroducingstrongencapsulationandexplicitdependencies.ItaddressesJarHell,weakencapsulation,andunreliableconfigurationthroughmodule-info.java,whichdefinesmodulenames,requireddependencies,exportedpackages,andserviceusa
Nov 29, 2025 am 03:04 AM
How to correctly handle the synchronization problem of parent-child entity deletion in JPA
This article explores how to ensure that the associated collection (such as the list of recipes owned by the user) of the parent entity (such as a user) is updated simultaneously when a child entity (such as a recipe) is deleted in a JPA application. The core problem is that even if the child entity is deleted from the database, the collection in the parent entity's memory may still retain its reference. The article provides two solutions: explicitly save the parent entity, or better yet, use the @Transactional annotation to ensure that entity state changes are automatically synchronized to the database when the transaction is committed, thereby avoiding data inconsistency.
Nov 29, 2025 am 02:57 AM
Custom processing strategy for special null values in arrays: use placeholder objects
This article explores the issue of distinguishing between "intentional nulls" (i.e., empty locations that are explicitly removed or marked as special) and "uninitialized nulls" (i.e., true free locations) in custom array structures. The article points out that giving null special business meaning is an anti-pattern, and recommends using a single placeholder object as a solution to improve code clarity, memory efficiency, and maintainability.
Nov 29, 2025 am 02:45 AM
Java implementation of random word generation and placement guide for game word search board
This tutorial details how to generate a specified number of unique random words for a game board in Java. The content covers the initialization of the word pool, user input validation, unique word selection mechanism based on java.util.Random, and a general method to integrate these words into the WordSearch game board. With this guide, developers will master the core randomization logic of building dynamic word games.
Nov 29, 2025 am 02:42 AM
Troubleshooting and solving the problem that XML mapping files cannot be called in MyBatis
This article aims to help developers solve the problem that the SQL statements defined in the XML mapping file cannot be called correctly when using the Spring Boot and MyBatis frameworks. The article will help readers quickly locate and solve similar problems by analyzing common causes, providing solutions and code examples, and ensuring that MyBatis can correctly load and execute SQL statements in XML mapping files.
Nov 29, 2025 am 02:39 AM
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