patpitchaya - Fotolia
Coffee Talk: Java, News, Stories and Opinions
Community driven content discussing all aspects of software development from DevOps to design patterns.
Recent Posts
-
The psychology of offering programming advice to developers
- Community Member 20 Dec 2021 -
Quickly learn how Kubernetes Operators work from this example
- Community Member 06 Dec 2021 -
Top 5 things to know about the Jakarta Servlet 6.0 API release
- Community Member 29 Nov 2021
Need to provide programming advice, or perhaps even harsh criticisms to a team of developers? Here's a nice way, pyscyhologically sound, way to do it.
Kubernetes (K8S) has become a very popular technology for working with distributed applications that run on the internet. K8S is intended to support an enormously large number of Linux containers ...
Jakarta EE 10 includes a full increment release of the Servlet API. Here are the top 5 features Java devs will enjoy when the Jakarta Servlet 6.0 API arrives.
-
What is Kubernetes vs Docker Compose? How these DevOps tools compare
29 Nov 2021 -
How to delete a Git repository
- TechTarget 29 Nov 2021 -
How to use jarsigner to sign JARs files example
- TechTarget 29 Nov 2021 -
How to use Java's javap tool by example
- TechTarget 29 Nov 2021 -
How to import a Maven project from GitHub into Eclipse
- TechTarget 29 Nov 2021 -
What's the difference between containerd and Docker?
29 Nov 2021 -
The 5 things devs should know about the Jakarta Servlet 6.0 API release
- TechTarget 29 Nov 2021
Confused between the difference between Kubernetes and Docker compose? Here we explain how the two DevOps construct are similar, and how they are different.
Trying to delete a local Git repository but the DVCS system still persists? Here's a quick example of how to locally remove a Git repo permanently and completely.
Here's a quick example of how to use Java's jarsigner to digitially sign JAR files.
Need to disassemble a Java class file? Want to look at the bytecode instructions generated from compiling source? These javap tool examples will show you how to use the javap command properly.
Here's a quick tutorial that shows you how to import a GitHub hosted Maven project into the Eclipse IDE.
What's the difference between containerd and Docker? Here we take a look at how these two cloud-native Kubernetes friendly technologies differ and compare.
Jakarta EE 10 includes a full increment release of the Servlet API. Here are the top 5 features Java devs will enjoy when the Jakarta Servlet 6.0 API arrives.
-
What's the difference between kubectl and kubelet in Kubernetes?
29 Nov 2021 -
How to delete all Git branches except master or main
- TechTarget 02 Nov 2021 -
What's the differences between a Docker image vs a container?
31 Oct 2021 -
Uncommit Git's Last Commit
- TechTarget 31 Oct 2021 -
How to delete remote Git branches fully and completely from GitHub
- TechTarget 28 Oct 2021 -
Quickly fix Git's "fatal: no upstream branch" error
- TechTarget 25 Oct 2021 -
How to discard local changes in Git
- TechTarget 23 Oct 2021 -
How to quickly remove Git branches from your repository
- TechTarget 22 Oct 2021 -
How to Git branch change
- TechTarget 18 Oct 2021 -
How to rename and change a Git branch name locally and remotely
- TechTarget 13 Oct 2021 -
Four examples of how to create a Git branch quickly
- TechTarget 11 Oct 2021 -
How to delete a Git branch locally
- TechTarget 10 Oct 2021 -
How to tag a Git commit id example
- TechTarget 06 Oct 2021 -
How to push new Git branches to remote repos on GitHub or GitLab
- TechTarget 03 Oct 2021 -
Create a new Git branch with current local changes saved
- TechTarget 02 Oct 2021 -
All the changes between JDK 11 and the Java 17 LTS release
- TechTarget 14 Sep 2021 -
When do you use Docker vs Podman? A developer's perspective
31 Aug 2021 -
Docker vs Virtual Machines: Which DevOps tool is best for you?
31 Aug 2021 -
Fix GitHub's 'support for password authentication was removed' error
- TechTarget 31 Aug 2021 -
Java shows promise for scaling AI apps
11 Aug 2021 -
RPA examples and use cases that prove robotic automation works
01 Aug 2021 -
How to fork a Git repository
- TechTarget 20 Jul 2021 -
How to download an older, specific version of UiPath Studio
- TechTarget 19 Jul 2021 -
How to download and install UiPath Studio
- TechTarget 02 Jul 2021 -
How to pass variables as UiPath arguments
- TechTarget 30 Jun 2021 -
How to use the UiPath Switch activity
- TechTarget 28 Jun 2021 -
UiPath If-Then conditional statements
- TechTarget 25 Jun 2021 -
What is a Git fork? Meaning, definition and a Git Fork example
- TechTarget 20 Jun 2021 -
Delete Windows recovery partition on a Desktop or Lenovo Thinkpad
- TechTarget 07 Jun 2021 -
Fix the ConcurrentModificationException
- TechTarget 03 Jun 2021 -
Quickly create a Git bare repo with init or clone
- TechTarget 02 Jun 2021 -
What is a bare Git repository?
- TechTarget 28 May 2021 -
How to use git submodules tutorial with examples
- TechTarget 21 May 2021 -
How to update Git submodules
- TechTarget 21 May 2021 -
How to create Git submodules in GitHub and GitLab
- TechTarget 30 Apr 2021 -
Yes, the original name for Java was Oak
- TechTarget 30 Apr 2021 -
Java's main function explained with examples
- TechTarget 29 Apr 2021 -
How to create a GitHub repository
- TechTarget 30 Mar 2021 -
How to run Jenkins builds on Docker
- TechTarget 30 Mar 2021 -
Program a Java factorial function with recursion and iteration
- TechTarget 30 Mar 2021 -
Top 5 Java recursion examples
- TechTarget 24 Mar 2021 -
How to clone from a git tag example
- TechTarget 26 Feb 2021 -
How to install Gitflow for Windows on old Git installations
- TechTarget 26 Feb 2021 -
Full Gitflow init workflow example tutorial
- TechTarget 26 Feb 2021 -
The Gitflow release branch process from start to finish
- TechTarget 24 Feb 2021 -
Gitflow hotfix branch example from start to finish
- TechTarget 24 Feb 2021 -
Java Mission Control 8 Eclipse plugin install
- TechTarget 29 Jan 2021 -
How to start Java's JVM Flight Recorder in 3 easy ways
- TechTarget 29 Jan 2021 -
How to clone a git repository with submodules init and update
- TechTarget 29 Jan 2021 -
The performance cost of autoboxing Java primitive types
- TechTarget 29 Dec 2020 -
A Jenkins YAML pipeline example
- TechTarget 28 Dec 2020 -
A quick start guide on how to run Jenkins on AWS
- TechTarget 23 Dec 2020 -
How to implement a remote Jenkins build trigger with a URL
- TechTarget 22 Dec 2020 -
How to use Jenkins shared libraries in your pipelines
- TechTarget 06 Dec 2020 -
An example of how to easily add Git submodules
- TechTarget 04 Dec 2020 -
Full GitHub Actions environment variables list for YAML build workflow scripts
- TechTarget 04 Dec 2020 -
Jenkins GitHub Webhook build trigger example
- TechTarget 03 Dec 2020 -
10 best GitHub Actions examples
- TechTarget 30 Nov 2020 -
Quickly publish GitHub Actions artifacts example
- TechTarget 30 Nov 2020 -
A simple Struts 2 file upload example
- TechTarget 25 Nov 2020 -
How to create an HTML5 and PHP file upload form for Apache
- TechTarget 24 Nov 2020 -
Simple Java file uploads with Servlets, JSPs and examples
- TechTarget 23 Nov 2020 -
How to use GitHub Actions secrets to hide your tokens and passwords
- TechTarget 22 Nov 2020 -
Quickly find and use a GitHub URL example
- TechTarget 22 Nov 2020 -
Jenkins Installer for Windows
- TechTarget 09 Nov 2020 -
Find Jenkins Home and change the JENKINS_HOME directory location
- TechTarget 07 Nov 2020 -
Jenkins GitHub Integration for CI/CD Pipelines
- TechTarget 06 Nov 2020 -
How to run a Jenkins WAR file
- TechTarget 05 Nov 2020 -
Fix the Jenkins "No such DSL method withMaven found" error
- TechTarget 04 Nov 2020 -
'403: No valid crumb' Jenkins GitHub webhook error fix
- TechTarget 04 Nov 2020 -
Use Jenkins' Warning plugin for CheckStlye, PMD and FindBugs reports
- TechTarget 02 Nov 2020 -
How to install Jenkins on Ubuntu 20.04 in 7 simple steps
- TechTarget 01 Nov 2020 -
How to install Jekyll on Windows 10
- TechTarget 01 Nov 2020 -
A declarative Jenkins pipeline for Ant builds on Docker example
- TechTarget 01 Nov 2020 -
How to use Jenkins with Ant to build your Java apps
- TechTarget 01 Nov 2020 -
Fix the Jenkins Docker error: Permission denied when trying to connect to Docker daemon
- TechTarget 31 Oct 2020 -
Fix the Jenkins error: Invalid agent type Docker specified [any, label, none]
- TechTarget 31 Oct 2020 -
How and when to perform a git clone depth 1
- TechTarget 30 Oct 2020 -
Examples of how to use the git log graph command
- TechTarget 29 Oct 2020 -
A simple Spring Boot file upload example with Ajax
- TechTarget 28 Oct 2020 -
An example Ajax file upload with pure JavaScript
- TechTarget 27 Oct 2020 -
How to install Git on Windows tutorial
- TechTarget 30 Sep 2020 -
Create a GitHub repository with this step-by-step tutorial
- TechTarget 30 Sep 2020 -
8 basic Git commands every GitLab developer must know
- TechTarget 29 Sep 2020 -
A step-by-step tutorial on how to delete a GitHub repository
- TechTarget 28 Sep 2020 -
AI, RPA offerings still stymied by security, governance concerns
21 Sep 2020 -
Use the Struts jQuery plugin to simplify Ajax request cycles
- TechTarget 13 Sep 2020 -
How to perform a GitLab delete remote branch operation on a repository
- TechTarget 13 Sep 2020 -
Use .gitkeep to commit and push an empty Git folder or directory
- TechTarget 13 Sep 2020 -
Create your first RPA robot in UiPath Orchestrator
- TechTarget 13 Sep 2020
Are you working in a cloud-native, Docker and Kubernetes based environment and you're wondering what the difference is between kubelet and kubectl? Here we clear up the kubectl vs kubelet confusion.
Here is a quick Git command to delete all branches except master or main from your local repository. It's a nice way to clean up your workspace after a milestone or a sprint.
Wondering what the difference is between a Docker image and container? Here we make the Docker container vs image comparision and show you how the two concepts differ.
Need to do a git uncommit to the last commit you were working on? Learn how to quickly uncommit files updates and changes in Git.
Learn the command to properly delete remote Git branches from tools such as GitHub and GitLab, while also deleting local remote tracking branches as well.
Here's a quick fix for Git's "fatal: The current branch has no upstream branch" error, along with a brief explanation of why this happens when you push a new Git branch to GitHub, GitLab or BitBucket.
Don't let a file or two be overlooked when you attempt to remove and discard local, uncommitted changes in Git. Learn how to locally revert and remove uncommitted changes to files in Git properly.
Need to permanently remove a Git branch locally? What about the remote tracking branch? Or maybe someone removed a Git branch on GitHub or GitLab and you need to synchronize with the server? Here ...
You want to do a Git branch change? Here we have a few Git branch change examples that will help you quickly address the version control challenge you are trying to solve, be it a branch renaming ...
Here's a quick example that shows you how to rename a Git branch locally and remotely. The branch renaming commands and techniques will work with GitHub, GitLab, Bitbucket and any cloud based Git ...
Forgotten the Git branch create command? Here we'l show you four different ways to create a Git branch, be it from the current branch, from a tag or from a commit id.
Here's a quick example of how to delete local Git branches from your workstation without deleting remote branches in your GitHub or GitLab repos.
Here's a quick example of how to tag a specific commit id in Git. This is perfect if an older commit id requires a tag but was not originally given one.
Did you create a new Git branch? Need to push that new Git branch to a remote repo such as GitHub or GitLab? This Git example tutorial shows you how to push new branches to remotes.
Did you update some code in the wrong Git branch? Here's how to save those local changes in a newly created Git branch, and clean up the original branch in the process.
Wondering what's included in the new Java 17 LTS release? Here's a list of all the changes made to the JDK between the Java 11 and Java 17 LTS releases.
Docker and Podman play two very separate and distinct roles in the modern DevOps pipeline. Here we compare Docker and Podman and show you how to choose which one is best for you.
Forced to choose between Docker and a virtual machine, which one should a developer choose. Here we compare and contrast the two DevOps tools and let you know which one is best to use.
Frustrated by GitHub's 'support for password authentication was removed' error? Here's how to fix it by creating a personal access token in GitHub.
Find out how Java provides a promising alternative for coding data science applications that may make it easier to develop more scalable AI.
Although Robotic Process Automation has been around for years, banks and financial institutions continue to find new RPA use cases to save time, effort and money.
Looking for the fork command in Git? Well, it doesn’t exist. Here we'll show you how to fork a Git or GitHub repo on your own.
Want to stop UiPath Studio from updating to the latest release all the time? Here's how to download and install a specific version of UiPath Studio.
It’s actually a bit tricky to install UiPath. This UiPath Studio install tutorial shows you how to find the download link and the right version.
How do you use a variable from one UiPath sequence in another? This tutorial will teach you everything you need to know about passing data between workflows.
While the UiPath If activity is great for simple logic, multi-branching demands the UiPath Switch activity. Learn how to use it to perform conditional logic.
Learn how to use the conditional UiPath If activity to create branches of logic in your RPA programs. This quick UiPath If-Then example will show you how.
Need to fork GitHub at the command line? This quick Git tutorial will show you how to install the GitHub CLI tools and fork a repository in the shell.
https://youtu.be/CMxze9XO6v8 Recovery drive partition removal If you've purchased a laptop from Lenovo or desktop from Asus, there's a good chance there's a hidden recovery partition immediately ...
Has the ConcurrentModificationException been thrown in you Java app? Here are four simple ways to fix the ConcurrentModificationException in your code.
There are two ways to create a bare Git repo -- a bare Git clone or a Git init bare. This git bare repo tutorial will show you how to perform both.
A bare Git repo has all the capabilities of a non-bare repository, with the exception that it’s not meant for local development.
If you’re wondering how to git submodule and logically link repositories together, this git submodule tutorial -- with lots of examples -- is for you.
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.
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.
When Sun Microsystems first developed a programming language to power their Star7 entertainment controller, they named it Oak, not Java.
Here's the anatomy of Java's main method. An anachronism with the rise of Servlets and JSPs, Spring Boot and Eclipse Microservice developers are seeing more of Java's main function as apps are ...
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.
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.
This Java recursion tutorial shows you how to create a recursive Java factorial function and compares these methods to iterative ones.
We often debate the merits of iterative vs recursive Java code. Let’s take a look at 5 Java recursion examples and see where the concept of recursion fits.
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.
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 ...
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.
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 ...
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.
Here's a quick Java Mission Control tutorial to show you how to install the Java Mission Control Eclipse plugin and start a Java Flight Recorder JVM profile run.
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.
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 ...
The boxing and unboxing of Java primitive types has severe performance implications. Uncover the truth about autoboxing Java primitive types in this JDK Mission Control and JVM Flight Recorder 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.
Need to run Jenkins on AWS? It's not a bad idea, especially when developers consider the need for a CI/CD server to integrate with peripheral resources. This quick example shows you the easiest way ...
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.
Keep complex logic out of your build scripts and take advantage of Jenkins shared libraries instead.
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.
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 ...
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 ...
Here are the 10 best GitHub Actions examples for developers and DevOps admins that want to learn and master continuous integration and deployment.
Here's a simple example on how a developer can publish GitHub Actions artifacts for download once a build workflow successfully completes.
In this Struts 2 file upload example we show you to take a local resource and upload it to a remote Java application server. All a developer needs is a file, a browser and an Internet connection ...
It's easier than ever for a developer to upload a file with PHP and HTML5 to an Apache web server. This example shows how to create an HTML and PHP file upload component that will work in any ...
It's not that hard to perform Java file uploads. The new Servlet and JSP API, along with HTML5 input form enhancements, make Java file uploads, both synchronously and asynchronously with Ajax, ...
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.
This example shows you how you can find and use the GitHub URL. Clone, fetch, push and pull to your remote repo easily with the GitHub URL at your disposal.
The Jenkins installer makes installation of the popular CI/CD tool incredibly easy. Follow these simple steps and you'll have the continuous integration server running on Windows in no time.
https://youtu.be/3znTQFLviwQ What is Jenkins Home? When Jenkins runs, it stuffs all of its logs, cloned repos, plugin configurations and build artifacts into the Jenkins Home folder. Basically, ...
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.
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
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.
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.
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 ...
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.
A local install of Jekyll on your Windows machine provides a variety of benefits which range from the ability to use your favorite text editor to fast compilation times. Even if you use GitHub ...
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 ...
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.
Here's a quick fix to the Jenkins Docker"Permission denied while trying to connect to the Docker daemon socket" error.
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 ...
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.
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.
Do you need to find a Spring Boot file upload that uses Ajax and can be used with Spring MVC web apps? This example uses HTML5 file input fields and a pure JavaScript Ajax call to accomplish the task.
Do you need to perform an Ajax file upload with pure JavaScript? This example lays out the steps to accomplish an Ajax file upload without the need for a JavaScript library like jQuery or Dojo.
Working with GitHub or BitBucket? Then you need to install Git. In this tutorial we show you how to install Git on Windows in 10 easy steps.
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 ...
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.
If you're ready to fly into the Danger Zone, then you're ready to follow these steps to delete a GitHub repository.
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 ...
The Struts 2 Ajax template is deprecated, but the Strut jQuery plugin is a more than capable replacement. In this Struts jQuery tutorial we show you how to integrate Ajax calls into your modern ...
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.
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.
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.