Java DevOps
Organizations working on the Java EE stack are trying harder than ever to make Java DevOps a reality. By bringing together development and operations teams, Agile software development is streamlined, test automation becomes easier to achieve and the implementation of continuous integration (CI) and continuous delivery (CD) streams can become a reality when Java DevOps is done right.
Top Stories
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Tip
18 Apr 2025
Agile vs. Waterfall: What's the difference?
Is change good or bad? The manner in which you embrace change might influence whether you prefer Waterfall or Agile methodologies. Here we compare the two approaches. Continue Reading
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Tip
19 Jan 2023
Who should be the product owner in Scrum?
Who should be the Scrum product owner and how does an organization choose the right person for that job? It's not an easy decision, but it's a critical one for all Scrum projects. Continue Reading
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Answer
26 May 2021
Terraform vs. Ansible: How do these DevOps tools differ?
There is some overlap between the two tools, but they really should coexist. Here we show you where Ansible and Terraform fit into your cloud-native, DevOps stack. Continue Reading
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Blog Post
21 May 2021
How to use git submodules tutorial with examples
If you’re wondering how to git submodule and logically link repositories together, this git submodule tutorial -- with lots of examples -- is for you. Continue Reading
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Blog Post
21 May 2021
How to update Git submodules
If your Git submodule is out of sync with the server, we can help. This git submodule update example shows you how to get the latest commits into your worktree. Continue Reading
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Answer
20 May 2021
Is a Docker or Kubernetes certification worth it?
Some DevOps professionals shun industry certifications. But in the cloud-native world, Docker and Kubernetes certifications make prospective job candidates stand out from the rest. Continue Reading
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Blog Post
30 Apr 2021
How to create Git submodules in GitHub and GitLab by example
In this GitHub submodule add example, we demonstrate how to take an independent GitHub repository, add a Git submodule and push back to the GitHub server. Continue Reading
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Blog Post
30 Apr 2021
Yes, the original name for Java was Oak
When Sun Microsystems first developed a programming language to power their Star7 entertainment controller, they named it Oak, not Java. Continue Reading
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Feature
27 Apr 2021
A guide to common variable naming conventions
Every developer should know the basic variable naming conventions to more easily move from language to language. Review the common ones here like Pascal, camel and snake case. Continue Reading
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Answer
23 Apr 2021
Kubernetes vs. Docker: What's the difference?
To succeed in cloud native development, developers need to know their way around Kubernetes and Docker. Here are the basics on these two container technologies. Continue Reading
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Answer
23 Apr 2021
Kubernetes vs. Rancher: The differences all devs should know
How are Kubernetes and Rancher related? Here are the basics developers need to know about Kubernetes and Rancher and how they can ultimately work together. Continue Reading
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Answer
31 Mar 2021
How do you become a developer advocate?
For those who love to code and want to share their IT knowledge, the developer advocate job might be a good fit. Learn how to make the transition from developer to advocate. Continue Reading
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Blog Post
30 Mar 2021
How to create a GitHub repository
This GitHub repository tutorial shows users how to create a new repository in the popular, cloud-hosted Git offering. Let’s dig into the central concepts of GitHub-based DevOps. Continue Reading
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Blog Post
30 Mar 2021
How to run Jenkins builds on Docker example
In this Jenkins and Docker integration tutorial, I’ll show you how to create a Jenkinsfile build with Docker. Just pull a Jenkinsfile from a GitHub repository, and Docker will take care of the rest. Continue Reading
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Quiz
26 Feb 2021
A tough, 10-question Java garbage collection quiz
Do you know which Java garbage collector is deprecated and which is best for stateless apps? Test your knowledge in this Java GC algorithm and tuning quiz. Continue Reading
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Blog Post
26 Feb 2021
How to clone from a git tag example
In this git tag clone example, we’ll demonstrate how to pull from a tag point in your git commit history. However, it comes with a catch, in the form of a detached head. Continue Reading
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Blog Post
26 Feb 2021
How to install Gitflow for Windows on old Git installations example
In some cases, Gitflow will come prepackaged with Git for Windows installations. Those on older installations will need do it manually. Here's a quick guide on how to perform a Gitflow install for ... Continue Reading
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Blog Post
26 Feb 2021
Full Gitflow init workflow example
Here's a quick Gitflow init example, along with a quick tutorial on how to perform a full Gitflow workflow after you execute the command. Continue Reading
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Blog Post
24 Feb 2021
Gitflow release branch process from start to finish example
The Gitflow release branch is the final step in this software development process workflow. Here we look at the start, finish and impact the Gitflow release has on the master, develop and feature ... Continue Reading
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Blog Post
24 Feb 2021
Gitflow hotfix branch example from start to finish
If you’re lucky, you’ll never have to start the Gitflow hotfix process. But just in case, here’s a quick example of how to incorporate the Gitflow hotfix branch into your version control workflow. Continue Reading
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Answer
18 Feb 2021
Your near-zero downtime microservices migration pattern
The possibility of extended downtime is a common reason to avoid a migration to microservices. Learn how to minimize downtime with this monolith-to-microservices migration pattern. Continue Reading
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Feature
11 Feb 2021
Use this Java performance tuning guide to optimize your JVM
There are two steps to Java performance tuning. First, assess your system to make sure it can improve. Then, optimize shared resources like CPU and memory. Continue Reading
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Quiz
10 Feb 2021
10-question Gitflow version control quiz
Gitflow version control is a DevOps-friendly way to manage the different branches of code in your environment. Make sure you're up to date on the latest developments and strategies. Continue Reading
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Blog Post
29 Jan 2021
How to start Java's JVM Flight Recorder in 3 easy ways by example
JDK Mission Control is feckless without a Java Flight Recorder file to profile. Here are 3 easy ways you can start Java Flight Recorder in Eclipse and monitor your JVM in JMC. Continue Reading
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Blog Post
29 Jan 2021
Clone a git repository with submodules using init and update example
When you clone a git repository, it won’t necessarily bring down the branches and code for the associated submodules. The git submodule init and update command and the --recurse-submodules switch ... Continue Reading
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Answer
27 Jan 2021
How do Java sampling and JVM instrumentation differ?
These two approaches both aim to improve Java performance and can be done together. But there is a fundamental difference between instrumentation and sampling. Continue Reading
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Quiz
22 Jan 2021
Test your knowledge of JVM profiling tools with this quiz
Since their inclusion in Java 11, Java Flight Recorder and JDK Mission Control have become the de facto Java profiling tools for the JVM. Test your knowledge with these 10 questions. Continue Reading
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Answer
19 Jan 2021
JVM tuning vs. Java optimization: What's the difference?
JVM tuning and Java optimization sound similar, and both aim to boost application performance. But they take fundamentally different approaches to accomplish their goals. Continue Reading
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Definition
15 Jan 2021
What is Java Flight Recorder and how does it work?
Java Flight Recorder is a Java Virtual Machine (JVM) profiler that gathers performance metrics without placing a significant load on resources. Continue Reading
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Video
15 Jan 2021
5 ways to force Java garbage collection
A developer can't technically force garbage collection in Java, but it can be made a priority. If you need to free up heap space, here are five ways to prioritize it in the JVM. Continue Reading
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Blog Post
28 Dec 2020
A Jenkins YAML pipeline example
YAML has joined the ranks of declarative and scripted pipelines in Jenkins. Here's an example of what the syntax for a Jenkins YAML pipeline looks like. Continue Reading
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Blog Post
22 Dec 2020
How to implement a remote Jenkins build trigger with a URL
This quick example will demonstrate how to implement a remote Jenkins build trigger. With the remote Jenkins build URL, a developer can call jobs from scripts, the CURL command and even Java code. Continue Reading
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Answer
18 Dec 2020
Declarative vs. scripted pipelines: What's the difference?
Scripted pipelines were once the standard for CI/CD but they are nearly extinct, and since supplanted by declarative pipelines. See how they compare and when each works best. Continue Reading
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Blog Post
06 Dec 2020
Jenkins shared libraries in pipelines example
Keep complex logic out of your build scripts and take advantage of Jenkins shared libraries instead. Continue Reading
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Blog Post
04 Dec 2020
An example of how to easily add Git submodules
This git submodule add example demonstrates how a developer can use these steps to create a Git repository and add a new Git submodule to it. Continue Reading
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Blog Post
04 Dec 2020
Full GitHub Actions environment variables list for YAML build workflow scripts example
The GitHub Actions environment variables available to a developer's workflows will vary from Ubuntu to Windows to MacOS. Here's a full environment variables list for each and why developers should ... Continue Reading
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Blog Post
03 Dec 2020
Jenkins GitHub Webhook build trigger by example
Running into difficulty with GitHub Webhooks and Jenkins builds? This Jenkins and GitHub webhook integration example shows how to trigger remote builds without the 403 no valid crumb in request ... Continue Reading
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Blog Post
30 Nov 2020
10 best GitHub Actions examples
Here are the 10 best GitHub Actions examples for developers and DevOps admins that want to learn and master continuous integration and deployment. Continue Reading
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Blog Post
30 Nov 2020
How to publish GitHub Actions artifacts by example
Here's a simple example on how a developer can publish GitHub Actions artifacts for download once a build workflow successfully completes. Continue Reading
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Feature
24 Nov 2020
Why GitHub renamed its master branch to main
The GitHub master branch is no more. Developers used to think it was untouchable, but that's not the case. Here's why GitHub made the switch from master branch to main branch. Continue Reading
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Blog Post
22 Nov 2020
How to use GitHub Actions secrets to hide your tokens and passwords example
You can confidently store keys, tokens and passwords with GitHub Actions secrets. This quick, not-so secret tutorial, provides an example of how to do exactly that. Continue Reading
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Blog Post
07 Nov 2020
Find Jenkins Home and change the JENKINS_HOME directory location by example
How to change JENKINS_HOME When Jenkins runs, it stuffs all of its logs, cloned repos, plugin configurations and build artifacts into the Jenkins Home folder. Basically, every ounce of ... Continue Reading
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Blog Post
06 Nov 2020
Jenkins GitHub Integration for CI/CD Pipelines example
This CI/CD example shows you how the integration of Jenkins with GitHub includes not only the ability to pull GitHub code, but also to trigger Jenkins build jobs with webhooks as well. Continue Reading
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Blog Post
05 Nov 2020
How to run the Jenkins WAR file example
Here's a quick example of how to run a Jenkins war file from the command line, DOS prompt or terminal window in Linux/Ubuntu. The short story? java -jar jenkins.war Continue Reading
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Blog Post
04 Nov 2020
Fix the Jenkins "No such DSL method with Maven found" error example
Here's a quick fix to the Jenkins 'No such DSL method 'withMaven' found among steps: NoSuchMethodError' error. Hint? Install the Jenkins Maven pipeline plugin. Continue Reading
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Blog Post
04 Nov 2020
'403: No valid crumb' Jenkins GitHub webhook error fix
Here's a quick fix to the "403 no crumb was included in the request" error you often see when a Jenkins GitHub webhook is configured incorrectly. Continue Reading
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Blog Post
02 Nov 2020
Use Jenkins' Warning plugin for CheckStlye, PMD and FindBugs reports example
The Jenkins Warnings plugin replaces the deprecated CheckStyle, FindBugs and PMD ones. This static code analysis in Jenkins example shows you how to integrate Jenkins, CheckStyle, FindBugs and PMD ... Continue Reading
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Blog Post
01 Nov 2020
How to install Jenkins on Ubuntu 20.04 by example
Here's a quick example to show you how to install Jenkins on Ubuntu 20. Additionally, we'll install Git and test your Jenkins installation with a Hello World build job. Continue Reading
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Blog Post
01 Nov 2020
A declarative Jenkins pipeline for Ant builds on Docker example
The easiest way to build your Apache Ant projects in Jenkins is with a pipeline and a Jenkinsfile that takes advantage of an Ant based Docker container. In this Apache Ant, Docker and Jenkins ... Continue Reading
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Blog Post
01 Nov 2020
How to use Jenkins with Ant to build your Java apps
Here's a simple example of how to build your Java apps in Jenkins with Ant. We demonstrate both the Jenkins Ant plugin and the Jenkins pipeline approach with a Jenkinsfile as well. Continue Reading
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Blog Post
31 Oct 2020
Fix the Jenkins Docker error: Permission denied when trying to connect to Docker daemon
Here's a quick fix to the Jenkins Docker"Permission denied while trying to connect to the Docker daemon socket" error. Continue Reading
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Blog Post
31 Oct 2020
Fix the Jenkins error: Invalid agent type Docker specified [any, label, none]
Here's how to quickly fix the "Invalid agent type Docker specified. Must be one of [any, label, none]" error by installing the correct Jenkins Docker pipeline plugins. We'll get your Jenkinsfile up ... Continue Reading
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Video
30 Oct 2020
A GitHub Pages tutorial on how to host personal websites
Follow these steps to set up a GitHub repository, clone the repo and host a personal website on GitHub Pages with contents indexable by Google. Continue Reading
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Blog Post
30 Oct 2020
How and when to perform a git clone depth 1 example
In this git clone depth 1 example, we'll walk you through the process of pulling only one commit and one branch back from a remote Git repository. Continue Reading
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Feature
29 Oct 2020
RPA skills in demand as organizations eye better engagement
RPA developer skills are among the most valuable on any resume. Here's why organizations seek out developers with these skills and what returns RPA can deliver to an enterprise. Continue Reading
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Blog Post
29 Oct 2020
How to use the git log graph and tree command
In this git log graph example we demonstrate not only how the git log graph works, but also how to use a pretty switch to make it more readable. Continue Reading
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Feature
13 Oct 2020
3 ways to implement AI in software development
Further advancements to AI make it a more appealing and useful option for enterprise software development. Here are three ways to implement AI and increase developer productivity. Continue Reading
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Video
30 Sep 2020
Get automated with this RPA and UiPath tutorial for beginners
Developers can eliminate tedious and monotonous tasks with the help of robotic process automation. This UiPath tutorial highlights the early steps with any RPA platform. Continue Reading
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Blog Post
30 Sep 2020
How to create a GitHub repository example
This step-by-step, tutorial will walk developers through the necessary steps to create a GitHub repository and how to create the cloud-hosted Git repo that acts as the cornerstone for all ... Continue Reading
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Blog Post
29 Sep 2020
Eight Git commands every GitLab developer must know
Every developer needs to know a few basic Git commands to become proficient with GitLab. Here are the top eight Git commands every developer must know to be on their way to GitLab mastery. Continue Reading
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Blog Post
28 Sep 2020
How to delete a GitHub repository example
If you're ready to fly into the Danger Zone, then you're ready to follow these steps to delete a GitHub repository. Continue Reading
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Blog Post
21 Sep 2020
AI, RPA offerings still stymied by security, governance concerns
Security, compliance and governance concerns along with human worries still play a role in the integration of AI-based and RPA offerings to an enterprise. Here are some ways to alleviate those ... Continue Reading
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Video
17 Sep 2020
An introduction to RPA programming with UiPath Studio
Follow this UiPath Studio tutorial for the basics of RPA programming and see how developers can improve their skills as they build in-depth applications. Continue Reading
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Blog Post
13 Sep 2020
How to perform a GitLab delete remote branch operation on any repository
It's not exactly a straightforward process for developers to have GitLab delete remote branches. In this GitLab tutorial, we'll show you how to remove remote GitLab branches with examples. Continue Reading
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Blog Post
13 Sep 2020
Use .gitkeep to commit & push an empty Git folder or directory
What is the .gitkeep file? How do you commit and push empty Git folders? In this quick tutorial we'll explain why git is not pushing empty folders and how to fix it. Continue Reading
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Blog Post
13 Sep 2020
Create your first RPA robot in UiPath Orchestrator
After your RPA program is coded, you will need to create a robot in UiPath Orcestrator so the robotic automation can me managed. This UiPath robot creation tutorial shows you how to do exactly that. Continue Reading
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Blog Post
03 Sep 2020
How to set Notepad++ as the Git editor instead of Vim
Frustrated every time you forget to add a Git commit message and Vim, the default Git editor pops up? Here's a way to make issuing git commits a bit friendlier. In this Git tutorial, we show you ... Continue Reading
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Video
02 Sep 2020
How to git stash untracked files with a push
Need to add untracked files and otherwise ignored files into the git stash? Here's how to use the --include-untracked and --all git stash push options. Continue Reading
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Blog Post
31 Aug 2020
How GitLab developers can merge any branch into master
In this GitLab merge branch to master example, we explain why a GitLab merge into master is different from other operations, and how to accomplish this task with a GitLab master merge request. Continue Reading
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Feature
24 Aug 2020
How to scale automation in DevOps environments
With the right tools and processes, programmers can automate at scale many of today's manual tasks. Here's how one company developed automation-at-scale best practices. Continue Reading
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Blog Post
21 Aug 2020
How to merge master into any branch in GitLab by examples
There are two ways a developer can have GitLab merge master into a branch. One is to merge master into the branch on the client while the other is to perform a GitLab pull request. Here are some ... Continue Reading
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Blog Post
13 Aug 2020
Why developers won't be able to find the gitconfig file
Can't find the .gitconfig or gitconfig files on your system? It's possible that Git didn't create them. Here's how to find gitconfig on the filesystem and create the if it's not there. Continue Reading
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Feature
12 Aug 2020
The 7 user story guidelines every Agile developer should know
Don't let bad user stories foil your Agile software development process. Here are the seven most common user story defects and some tips on how to write better user stories. Continue Reading
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Blog Post
12 Aug 2020
How to rebase GitHub branches and commits example
In this tutorial on how to rebase GitHub repositories, we will clone a repo, perform a rebase from master and to master, and push back to the remote GitHub server. Continue Reading
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Blog Post
05 Aug 2020
How to git push GitLab commits to origin by example
When a local git repository is out of sync with the GitLab server, developers must git push GitLab commits to origin. Here is how to push the commits to origin and maintain successful development. Continue Reading
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Blog Post
05 Aug 2020
An example of how to create and clone a GitLab repository
One of a developer's first tasks when they start with GitLab is to clone the GitLab repository. Here's how to create a GitLab repository and clone it from the server to a local machine. Continue Reading
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Blog Post
05 Aug 2020
Fix "There isn't an Orchestrator present" error with the right UiPath Orchestrator URL
Is the UiPath Assistant complaining that the UiPath Orchestrator URL is wrong? Here's how to fix the UiPath Orchestrator present at the indicated URL error. Continue Reading
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Blog Post
02 Aug 2020
How to fix the UiPath invalid machine key error
Here's a quick fix to the UiPath Invalid Machine Key error. If you're having a problem connecting your RPA robots to Orchestrator from the Assistant, this solution will set you on the right path. Continue Reading
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Blog Post
01 Aug 2020
How TUF can secure software systems from update vulnerabilities
An emerging specification from CNCF looks to secure software systems thanks to the open source community and a focus on update vulnerabilities that limit the effects of a potential attack. Continue Reading
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Blog Post
30 Jul 2020
How to create and delete GitLab projects by example
To get started with GitLab, you first need to create a GitLab project. And when you're finished, you might also want to delete a GitLab project. Here we show you how to both create and remove ... Continue Reading
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Blog Post
29 Jul 2020
How to do a self-hosted install of GitLab on Ubuntu 20
This Git tutorial demonstrates how to install GitLab on Ubuntu 20. With a GitLab server installed locally on Ubuntu, a developer can enjoy GitLab without the cloud. Continue Reading
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Feature
28 Jul 2020
Reduced cost, responsive apps from micro front-end architecture
Micro front-end development has grown in prominence though has not yet found its footing in the enterprise. Learn more about micro front ends and consider some potential pros and cons. Continue Reading
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Blog Post
28 Jul 2020
How to edit the Ubuntu hosts file and ping a domain name locally
Here's a quick video example of how to do an Ubuntu hosts file edit. This is useful for development and testing when a developer wants to mimic a production domain name locally. Continue Reading
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Blog Post
26 Jul 2020
How to remove Git submodules
There’s a lot of misinformation out there about how to remove a Git submodule. Follow these steps to delete Git submodules. Continue Reading
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Blog Post
26 Jul 2020
How to Git clone on Ubuntu with GitLab and GitHub
Need to perform an Ubuntu git clone operation? Here we will show you how to install Git on Ubuntu and then clone, commit and even push to GitLab and GitHub. Continue Reading
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Blog Post
26 Jul 2020
Quick fix to Git's fatal 'unable to access SSL certificate' error
Here's a quick fix to the Git 'unable to access GitHub or GitLab' SSL certificate settings error when you attempt to clone from GitHub or GitLab. Continue Reading
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Video
20 Jul 2020
How to easily merge and resolve git stash pop conflicts
Don't let a conflict with git stash pop derail development. Here's how to merge and resolve this issue and clean up code for proper programming. Continue Reading
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Blog Post
15 Jul 2020
Use git worktree add and never switch branches again
Git Worktree Add Example I was today years old when I learned you could have multiple git working trees active at the same time. The idea is simple. Imagine you have multiple branches and want to ... Continue Reading
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Blog Post
04 Jul 2020
How to perform a shallow git clone
This shallow git clone example shows you how to use the --depth switch to limit the git commit history pulled to your local machine. Continue Reading
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Blog Post
03 Jul 2020
How to rename a GitHub repository with Git example
Sometimes new business requirements will force a Git admin to rename a GitHub repository. Here's how to do it, and here's how it will impact existing users. Continue Reading
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Blog Post
27 Jun 2020
How to create a UiPath Orchestrator process to run robots
Want to run your RPA robots? Then you need to create a UiPath process. In this UiPath Orchestrator tutorial, we show you how to create processes and run unattended robots. Continue Reading
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Blog Post
27 Jun 2020
How to publish to UiPath Orchestrator example
UiPath Orchestrator runs in the cloud. UiPath Studio runs on a developer's desktop or laptop. And RPA robots typically run on a physical desktop computer as well. Which means a piece of software ... Continue Reading
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Blog Post
25 Jun 2020
Make this UiPath Hello World example the first project in your RPA journey
The first step in every RPA journey must be the creation of a Hello World robot. In this UiPath Hello World example, we step you through the creation of your first automation app. Continue Reading
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Video
15 Jun 2020
Compare git stash pop and git stash apply for file restores
Do you want to save or delete your stash entries? Your choice will determine the outcome of the debate between the git stash pop and git stash apply command. Continue Reading
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Blog Post
09 Jun 2020
How to master the Git status command
To really understand distributed version control, you must master the Git status command and understand the working tree states upon which it reports. Continue Reading
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Blog Post
08 Jun 2020
How to set important Git config global properties
One of the key files managing how your DVCS system works is the glboal Git config file. Here we show you the most important global gitconfig settings and uses. Continue Reading
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Blog Post
07 Jun 2020
List and show Git config settings
If you are wondering how a variable is assigned a value in Git config use --list to inspect the gitconfig files. Continue Reading
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Blog Post
05 Jun 2020
Why the pull request process could work beyond development
The pull request process focuses on merit-based changed and an impartial review process to create improvements. It works well with open source software development. How would it fare in other areas ... Continue Reading
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Blog Post
03 Jun 2020
How to squash git commits by example
If you goal is to clean up your repository, this squash git commits example give you the motivation you need to clean up your feature and topic branches. Continue Reading
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Blog Post
02 Jun 2020
Fix for the GitLab "Unable to locate package gitlab-ee" on Ubuntu 20
If you're doing a self-hosted GitLab Ubuntu 20 install and you hit the "Unable to locate package gitlab-ee" error, here's the solution to fix the problem. Continue Reading
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Blog Post
01 Jun 2020
Five git log oneline examples
Save time and effort when inspecting your commit history with the git log --oneline command. Continue Reading
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Blog Post
01 Jun 2020
How to Git rebase master onto any branch by example
If you think you need to git rebase master to a branch like develop or release, this tutorial will guide your way, while also letting you know of potential dangers. Continue Reading