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Coffee Talk: Java, News, Stories and Opinions
Community driven content discussing all aspects of software development from DevOps to design patterns.
Recent Posts
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Columns vs rows: The difference between rows and columns compared
- TechTarget 22 May 2022 -
Docker run vs docker-compose: What's the difference?
- TechTarget 20 May 2022 -
Git commit config and credential confusion causes consternation for customers
- TechTarget 19 May 2022
Learn the difference between columns vs rows, and learn how the use of rows and columns to organize objects and information in spreadsheets and tables has improved various fields from data ...
Both docker run and docker-compose can be used to start Docker containers, but there are key differences between the two. Here we explore the differences between docker-compose and docker run, and ...
A user who accidentally provides a GitHub username and password instead of the Git username and email address may have inadvertently published their security credentials to the world.
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When to use Dockerfile vs docker-compose: What's the difference?
- TechTarget 18 May 2022 -
How to setup an Apache reverse proxy server example
- TechTarget 17 May 2022 -
How to use docker-compose with Apache httpd example
- TechTarget 17 May 2022 -
How to run Apache Docker httpd images with local files example
- TechTarget 17 May 2022 -
How to dockerize Apache httpd websites example
- TechTarget 17 May 2022 -
Imperative vs. declarative Kubernetes commands: What's the difference?
09 May 2022 -
CDI Full vs CDI Lite: What's new in Contexts and Dependency Injection 4.0
20 Apr 2022
Wondering what's the difference between Dockerfile and docker-compose? Using simple examples, we'll compare not only the Dockerfile and the docker-compose.yaml file, but also the docker build and ...
Most enterprise architectures use Apache as a reverse proxy. Unfortunately, Apache is not configured as a reverse proxy by default. In this quick tutorial, we show you how to configure an Apache ...
Docker-compose and Apache httpd It's easy to start an Apache Docker image by issuing an imperative docker run command in PowerShell or a Linux terminal window. However, as the docker run command ...
The best way to run Docker's httpd Apache web server image is to map a volume that points to local files on your hard drive. This example shows you how to run Apache in Docker without creating a ...
Need to dockerize Apache? Want to build a custom Docker httpd image that hosts your website? Here we provide a simple Apache Dockerfile example that will build a custom httpd Docker image for your ...
Imperative and declarative Kubernetes commands are the two different ways to configure the state of your clustered environment. Here we compare declarative versus imperative commands and show you ...
There's an interesting change packaged inside the CDI 4.0 release that will change the way you think about the API. Version 4.0 of Jakarta Contexts and Dependency Injection (CDI) changed the ...
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Hibernate 6.0 release marks a milestone for JPA 3.x development
19 Apr 2022 -
Being Agile vs. doing Agile: What's the difference?
18 Apr 2022 -
Top 5 best Scrum Master certifications of today
19 Mar 2022 -
Noon is not 12am. Midnight is not 12pm. Code appropriately.
- TechTarget 14 Feb 2022 -
How to convert a PEM file to PPK format
- TechTarget 08 Feb 2022 -
Node.js file upload example with Ajax and JavaScript
- TechTarget 07 Feb 2022 -
How to create an AWS account alias
- TechTarget 26 Jan 2022 -
Lessons learned from the Log4j vulnerability
25 Jan 2022 -
Why is the Bootstrap grid system 12 columns wide?
- TechTarget 25 Jan 2022 -
Comparing Rest vs GraphQL on performance and ease of use
23 Jan 2022 -
Why we use ./ (dot slash) to run Linux scripts?
- TechTarget 21 Jan 2022 -
Fix Apache's 'ServerRoot Must be a Valid Directory' error quickly
- TechTarget 21 Jan 2022 -
Principle of least privilege examples & best practices
- TechTarget 19 Jan 2022 -
Quickly set up GitHub SSH example
- TechTarget 16 Jan 2022 -
How to install Apache's Web Server on Windows 10 quickly
- TechTarget 15 Jan 2022 -
Top 5 AWS root account best practices
- TechTarget 14 Jan 2022 -
BitBucket SSH key generation tutorial
- TechTarget 14 Jan 2022 -
How to create and run a shell script in Linux and Ubuntu
- TechTarget 14 Jan 2022 -
Git securely with a GitHub SSH URL example
- TechTarget 13 Jan 2022 -
Quick GitHub 'Permission denied (publickey)' SSH error fix
- TechTarget 12 Jan 2022 -
A quick GitLab SSH key configuration example
- TechTarget 11 Jan 2022 -
How to SSH into GitHub on Windows example
- TechTarget 11 Jan 2022 -
A quick GitHub SSH clone example
- TechTarget 11 Jan 2022 -
How chmod numbers work explained by example
- TechTarget 08 Jan 2022 -
Was GitHub's password authentication removal an overstep?
- TechTarget 05 Jan 2022 -
Git and GitHub SSH KeyGen by Example
- TechTarget 02 Jan 2022 -
The psychology of offering developers programming advice
31 Dec 2021 -
How to quickly change your branch in Git
- TechTarget 31 Dec 2021 -
Fix Putty's 'Key Exchange Algorithm Agreement' error
- TechTarget 29 Dec 2021 -
Spring Boot file upload example with Ajax
- TechTarget 28 Dec 2021 -
Simple Ajax file upload with pure JavaScript example
- TechTarget 27 Dec 2021 -
Simple Struts 2 file upload example
- TechTarget 25 Dec 2021 -
Create an HTML5 and PHP file upload form for Apache
- TechTarget 24 Dec 2021 -
Java file upload example with Servlets, JSPs
- TechTarget 23 Dec 2021 -
Learn how Kubernetes Operators work from this example
06 Dec 2021 -
How to find and use a GitHub URL by example
- TechTarget 01 Dec 2021 -
Top 5 things to know about the Jakarta Servlet 6.0 API release
29 Nov 2021 -
Kubernetes vs Docker Compose? How these cloud-native 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 example
- TechTarget 29 Nov 2021 -
How to import a Maven project from GitHub into Eclipse
- TechTarget 29 Nov 2021 -
What is the difference between Docker and containerd?
29 Nov 2021 -
The 5 things devs should know about the Jakarta Servlet 6.0 API release
- TechTarget 29 Nov 2021 -
What is 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 is the difference between a Docker image vs a container?
31 Oct 2021 -
Uncommit Git's Last Commit Example
- TechTarget 31 Oct 2021 -
How to fully delete remote Git branches from GitHub
- TechTarget 28 Oct 2021 -
Fix Git's "fatal: no upstream branch" error quickly
- TechTarget 25 Oct 2021 -
How to discard your local changes in Git
- TechTarget 23 Oct 2021 -
How to remove Git branches from your repository
- TechTarget 22 Oct 2021 -
How to rename and change a Git branch name locally & remotely
- TechTarget 13 Oct 2021 -
4 examples of how to create a Git branch quickly
- TechTarget 11 Oct 2021 -
How to quickly delete a Git branch locally
- TechTarget 10 Oct 2021 -
How to tag a Git commit id by example
- TechTarget 06 Oct 2021 -
How to push new Git branches to remote repos on GitHub or GitLab by example
- TechTarget 03 Oct 2021 -
Create a new Git branch with current local changes saved example
- TechTarget 02 Oct 2021 -
All the changes between JDK 11 and the Java 17 LTS release
- TechTarget 14 Sep 2021 -
When to you Docker vs Podman? A developer's perspective
31 Aug 2021 -
Docker versus 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 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
Hibernate 6.0 has finally been released. Here's what this full increment release means for developers who use JPA for persistence.
What's the difference between being Agile and doing Agile? It's subtle, but it's significant. Here we compare them and show you how to both be Agile and do Agile the right way.
Whether you are hiring for a career position or just trying to build your resume, this list of the top 5 best professional Scum Master certifications to have will provide you insights on the skills ...
The terms 12am and 12pm make no logical sense. Neither one is noon or midnight. Remove the 12am vernacular from your applications. Users will thank you.
Need to SSH into a remote server with PuTTY but your PEM file just won do the trick? Here's a quick example of how to convert a PEM file to PPK format with PuTTYGen so your SSH sessions with PuTTY ...
The Node.js file upload process is made easy with libraries like 'fs' and 'formidable.' In this JavaScript and Node.js file upload example, we show you how to move files from the browser to the ...
Need to create, change or rename an AWS account alias? It's not too hard to do, and your users will thank you. Here are the steps to do it.
The Log4j 2 vulnerability was a black eye for the Java community. Here's how to protect yourself today, and how the community can protect itself in the future.
Ever wonder why they created a 12-column Bootstrap grid system, and not 10 or 15? It's the same reason there's 60 seconds in a minute, or 360 degrees in a circle.
The problem with RESTful web services that use JSON or XML as a data exchange is bloat and verbosity. Compare REST vs GraphQL performance if you want to simplify your web API development.
Ever wonder why you need a ./ before a Unix shell script or command of your own in order to run it? Here's what the Linux dot slash does and why Unix systems require the ./ syntax.
Here are three easy ways to fix Apache's ServerRoot Must be a Valid Directory error. Any of these remedies will get your Apache HTTP server running again.
We see examples of the principle of least privilege everywhere in our daily lives. What does the principle of least privilege mean as applied to security in software development and DevOps?
Here's a very quick example of how to setup GitHub SSH keys and use them to perform Git clone, push and pull commands over a securely configured SSH connection.
Let me step you though the installation of Apache's Web Server on Windows 10. You'll learn how to install Apache 2.4 on Windows, and avoid common httpd config errors.
The credentials of your server's super user must be protected at all costs. Here are five AWS root account best practices to protect yourself from being hacked.
This simple and straight-forward example shows you how to quickly configure BitBucket SSH keys, so you can connect Git to BitBucket with a secure shell (SSH).
It's not hard to create and run a shell script in Linux distros like Ubuntu, but there are a few non-obvious pitfalls you need to avoid. Here's a quick example of how to execute a script in Linux.
Where do you find the GitHub SSH URL? How do you use it to clone or pull from your remote GitHub repository? This quick Git tutorial shows you everything you need to know about the GitHub SSH URL.
Here are the three most common fixes to the GitHub 'Permission denied (publickey)' error over SSH.
To connect Git operations securely to your GitLab repository, you will need to configure GitLab SSH keys both locally and remotely. Here's a quick example of how to do it.
Here's a quick tutorial to connect to GitHub with SSH on Windows. It's easy, and you'll establish a GitHub SSH Windows connection with Git in no time.
Here's a quick example of how to perform a GitHub SSH clone operation. In just five minutes, learn how to create SSH keys, configure them in GitHub and perform the GitHub clone with SSH keys in Git.
Don't let yourself be intimidated by chmod numbers and permissions. Here's a quick and easy to understand explanation of how chmod permission numbers work in Linux.
Was GitHub's removal of password based authentication a security overstep? If it makes it harder for developers to get started with Git and GitHub, it was.
Here's a quick example of how to securely connect Git to GitHub with SSH KeyGen produced secure shell keys on both Windows and Linux.
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.
These Git branch change examples will help you quickly address the specific version control challenge you are trying to solve, be it a branch renaming or a switch, list and checkout of existing ...
Ever encounter the 'Couldn't Agree a Key Exchange Algorithm' error when you fail to connect with Putty to an AWS EC2 instance or other server-side resource? This is the first fix you should try.
Do you need to find a Spring Boot file upload that uses Ajax and works 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.
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, ...
https://youtu.be/fO3vUMc_WbI 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 ...
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.
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.
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.
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 ...
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.