programming

16 Sep 2024

DZone Java Zone

Selenium Grid Tutorial: Essential Tips and How To Set It Up

Being a tester or a skilled web developer, you need to test your applications for bugs and performance in all the available browsers and operating systems. But with so many dependencies in hand, having not just different browsers, but different versions, too, it surely becomes a hefty task.

Most importantly, all these processes must be automated to the greatest extent because in major companies, individually creating test cases and pipelines would be expensive and the most obvious, the least preferable method ever. Now this is where Selenium Grid, an extensively used server-based test automation tool comes into the picture.

16 Sep 2024 3:00pm GMT

How to Merge Excel XLSX Files in Java

In this article, we're going to learn how to increase the efficiency of a common file merging workflow with the help of a web API solution. Specifically, we are going to learn how to merge Excel XLSX files - one of the most common document types we can expect to work within a file-processing automation environment.

Context for Programmatic XLSX File Merging

If we're writing code to solve problems related to file processing efficiency and automation, there's a good chance we're creating and/or expanding applications that deal with large volumes of Excel files. We may, for example, find that there's no automated workflow currently in place (or, perhaps, an inefficient one) to combine the various unique Excel reports created by each individual department in our organization.

16 Sep 2024 12:00pm GMT

13 Sep 2024

DZone Java Zone

How To Solve OutOfMemoryError: Metaspace

There are 9 types of java.lang.OutOfMemoryErrors, each signaling a unique memory-related issue within Java applications. Among these, java.lang.OutOfMemoryError: Metaspace is a challenging error to diagnose. In this post, we'll delve into the root causes behind this error, explore potential solutions, and discuss effective diagnostic methods to troubleshoot this problem. Let's equip ourselves with the knowledge and tools to conquer this common adversary.

JVM Memory Regions

To better understand OutOfMemoryError, we first need to understand different JVM Memory regions. Here is a video clip that gives a good introduction to different JVM memory regions. But in a nutshell, JVM has the following memory regions: