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Java vs Kotlin: Which JVM Language is Right for Your Next Project?

KotlinisthebetterchoiceformostnewJVM-basedprojects,especiallyAndroidapps,duetoitsconcisesyntax,built-innullsafety,coroutinesforasyncprogramming,andmodernlanguagefeaturesthatimprovedeveloperproductivityandcodemaintainability;1.Kotlinreducesboilerplate

Aug 20, 2025 am 09:37 AM

How to use Selenium WebDriver to close web ad pop-ups

This article aims to help developers solve the problem of closing ad pop-ups when using Selenium WebDriver to automate tests or web operations. We'll explore how to target and close ad popups located in iframes and how to switch back to the main document after the action is complete. Through this article, you will master effective ways to deal with such problems and ensure the stability and reliability of automated scripts.

Aug 20, 2025 am 09:36 AM

Solve Spring Boot Gradle project startup failure: Port 8080 has been occupied

This article aims to help developers resolve the error "Web server failed to start. Port 8080 was already in use." encountered when starting a Spring Boot Gradle project. By providing cross-platform (Windows, Unix/Linux/Mac) port occupancy detection methods and guidance on terminating the occupancy process, ensure that Spring Boot applications can be successfully up and running on the specified port.

Aug 20, 2025 am 09:15 AM

How to deal with mapping issues where Bean attributes are inconsistent with database column names in Spring JDBC

In Spring JDBC, when using BeanPropertyRowMapper for result set mapping, the default mapping mechanism may not work correctly if the property name of the Java Bean does not exactly match the column name of the database table, especially when there are non-standard naming conventions (such as prefixes). This article will explore the working principle and limitations of BeanPropertyRowMapper, and provide a robust solution: implement a custom RowMapper interface to accurately control the data mapping process, ensure that query results can be successfully mapped to POJO objects even if the column names vary greatly, and provide detailed code examples and usage guidance.

Aug 20, 2025 am 09:06 AM

How to remove the first object of the specified class in ArrayList in Java?

This article aims to describe how to efficiently remove the first object of a specified class in Java's ArrayList. By using the `instanceof` keyword, we can iterate over the ArrayList, identify the instance of the target class, and remove it. This article will provide detailed code examples and precautions to help developers avoid common pitfalls and achieve safer and more efficient list operations.

Aug 20, 2025 am 08:54 AM

Android Studio: Use RecyclerView to efficiently display complex object lists

This article aims to guide Android developers how to efficiently present a list of custom objects with multiple fields in Android Studio. In response to the confusion that novice developers encounter when dealing with ArrayList object display, we will introduce in detail how to use modern and highly performant RecyclerView components to combine custom layouts and adapters to display multiple fields of each object in a row-based layout and stack them one by one, thus providing a clear, scalable and excellent performance list display solution.

Aug 20, 2025 am 08:33 AM

How to write a Java program that prompts the user to enter until a specific condition is met

This article aims to guide readers on how to write a Java program that cycles to prompt the user to enter numbers until the input numbers fall within a specified range (in this case, between 30 and 70). We will explain in detail how to use the while loop and Scanner class to implement this functionality, and provide sample code and considerations.

Aug 20, 2025 am 08:30 AM

Solutions for events not passed in callbacks when using LiveData

This article aims to solve the issue where the LiveData value is updated from the callback function when using LiveData in Android development, but the observer does not receive the update event. By analyzing the difference between setValue() and postValue(), the correct way to update LiveData values in different thread environments is explained, and corresponding code examples are provided to help developers avoid such problems.

Aug 20, 2025 am 08:18 AM

Use Mono.error to perform WebClient exception handling unit testing

This article aims to resolve issues encountered when unit testing the doOnError method when using WebClient for requests. Usually, throwing a WebClientResponseException directly cannot trigger exception handling logic in doOnError. This article will explain how to correctly simulate exceptions using Mono.error to ensure that doOnError can be tested effectively.

Aug 20, 2025 am 08:15 AM

Use Selenium to close web ad pop-ups: Advanced Guide

This article aims to provide an effective way to close web ad popups using Selenium WebDriver. When an ad pop-up appears in an iframe, direct targeting and clicking the Close button will usually fail. This article will introduce in detail how to switch to an iframe, close the pop-up window, and switch back to the main document to ensure the smooth progress of the automated testing process.

Aug 20, 2025 am 08:06 AM

Azure Blob storage upload failed: Troubleshooting and solution for permissions

This article aims to help developers solve the "AuthorizationFailure" error encountered when uploading files on Azure Blob storage, that is, the problem of insufficient permissions. By checking and configuring the network settings of Azure storage accounts, especially firewall rules, allowing client IP addresses to access, upload failures due to IP restrictions can be effectively resolved. This article will explain in detail how to make sure your application can interact with Azure Blob storage smoothly.

Aug 20, 2025 am 07:54 AM

How to elegantly stop threads in ExecutorService

This article aims to address how to stop a running thread in timeout or other specific situations when using ExecutorService, while avoiding the complete shutdown of the ExecutorService so that subsequent tasks can still be submitted. We will explore the correct way to use the shutdownNow() method in conjunction with the Thread.interrupted() flag, and how to handle interrupt requests gracefully in Runnable tasks.

Aug 20, 2025 am 07:42 AM

What is the Spring Framework for Java?

TheSpringFrameworkisacomprehensive,open-sourceplatformforbuildingJavaapplications,particularlyenterprise-levelsystems,introducedin2003tosimplifycomplexdevelopmenttasksbyprovidinginfrastructuresupportthatallowsdeveloperstofocusonbusinesslogic.Itachiev

Aug 20, 2025 am 07:27 AM

java

Solve the compatibility issue of block transmission when Apache CXF client sends byte arrays

This article discusses the possible problems that may be encountered when sending a byte array (byte[]) as a REST API request body when using Apache CXF as a JAX-RS implementation. The core challenge is that Apache CXF may use HTTP chunked transmission encoding by default in OpenLiberty environments, and the target service may not support this mode. The article elaborates on the manifestation and root causes of the problem, and provides a professional solution to solve this compatibility problem by enabling chunked transmission support on the receiving server to ensure smooth data transmission.

Aug 20, 2025 am 07:03 AM