Videos

5 tool categories to build a powerful DevOps technology stack

Want to speed application delivery and deployment? Consider adding one of these five DevOps tools and technologies to your IT department.
The Git working tree, index and commit history explained by example

This quick tutorial explains the importance of the Git working tree. With the help of the git status command, you'll become an expert on how the popular DVCS tool transforms the file system.

Developer vs. DevOps roles: What's the difference?

Don't lump developers and DevOps engineers into the same category. Compare and contrast the two and see which one is a better fit for your programming career.
How to use the git clone command with GitHub by example

Move code from remote-hosted version control repositories into local ones with one command. Follow this Git clone tutorial to move code into local environments.
How to integrate Nexus with Jenkins for simpler builds

Integrate Nexus with Jenkins in your local environment to simplify development and run build jobs with minimal headaches.
How to use the Jenkins multi-configuration project

In this Jenkins Matrix project plugin example, create a two-dimensional build job that runs 16 build jobs at once.
JDBC tutorial: Easy installation and setup with Apache Derby

New database developers can get up to speed with this tutorial on JDBC and Apache Derby. Follow these steps to install and connect to the Derby database on your terminal.
How to test and deploy WARs with Tomcat and Eclipse

With the proper configuration and integration, it's easy to deploy WAR files from Eclipse to Tomcat. Follow these five steps that every developer should know.
Tomcat vs. Jetty: How these Java application servers compare and differ

What is your Java application server of choice? Where you stand on the Jetty vs. Tomcat debate probably lends a hand to which one you use in production.
Simple Java 8 Predicate example with lambda expressions and interfaces

Use this Java Predicate example to help developers learn lambdas, expand functional programming and reduce code verbosity in their environment.
How to run Java preview features such as JDK 13 text blocks

Follow these five steps to enable the JDK 13 text blocks as part of the preview features in the latest Java release and use multi-line String literal in your code.
Tomcat vs. Apache HTTP Server: What's the difference?

Don't get caught up in the improper phrasing of "What's the difference between Tomcat and Apache?" Let's straighten out the confusion and compare the two server offerings.
Step-by-step Jenkins Tomcat deploy of a WAR file

You can use Jenkins to deploy a WAR file to a container in your environment in four easy steps. Follow along to learn how to push your Jenkins pipeline to deploy to Tomcat.
Step-by-step Maven Tomcat WAR file deploy example

Five simple steps are all that's needed to deploy WAR files with the Tomcat-Maven plugin. Use the following steps for a successful deployment in your environment.
Hibernate vs. JDBC: How do these database APIs differ?

Don't overthink it. Hibernate and JDBC aren't the same thing. But how do these database APIs differ? Here's a brief history lesson and explainer to find out.
Best Java static code analysis tools for code quality automation

Don't let faulty code bring down your software project. These Java code quality tools can help find and fix common errors before they become problems.
5 Java test frameworks and tools JDK developers must know

Java testing tools can ensure you release a product that's been carefully examined for bugs and errors. Here are five frameworks that can lighten that testing burden.
Java command-line interface tools every JDK developer should know

These five JDK tools -- javac, javap, jstat, jdeps and jar -- should be on the must-know list for every developer to help comprehend the underlying code in a project.
The top Java deployment tools to use on your next project

Java application deployment tools such as Maven and Gradle can be beneficial for your IT team. Compare those and other options, along with frameworks, to ease this process.
JDBC in Java: 5 facts to know before you begin

Are you new to Java programming? Here are five interesting facts about the JDBC API and what you need to know about it to ease your development pathway.
How to create a private GitHub repository example

The private repository feature is now available in the GitHub free tier. Here's how to create and clone a repository without error messages to derail development.
JDBC vs. ODBC: What's the difference between these APIs?

There are more similarities between ODBC and JDBC than there are differences. But, the differences are significant. Here we highlight them.
Use Tomcat, Eclipse to create a JAX-RS REST web service

Use this step-by-step tutorial with an example rock-paper-scissors game to understand how to create and take advantage of RESTful web services with Eclipse and Tomcat.
IBM Watson Content Hub has problems before you even start

IBM's Watson might make waves on certain TV game shows, but it can't even get some simple basic forms correct, which could sour potential developers before they even start.
Follow this Java screen scraper example to aggregate content

Follow this JSoup example of screen scraping to aggregate data from live webpages, and generate results that can be easily identified and organized.
Don't git revert that last commit, git reset instead

Developers should only use git revert if they need to reverse out a specific change in their code. To simply undo a previous commit to a shared repository, use git reset instead.
Jenkins creator explains why a successful build job is blue

Instead of the often-recognized red, yellow and green layout for success and failure, Jenkins replaced green with blue. If you've ever wondered why, here is your answer.
Tough sample GitHub interview questions and answers for job candidates

If you're a developer in search of a DevOps job, you'll need to address these Git and GitHub interview questions and answers. And don't forget about distributed version control systems either.
Install the Jenkins Artifactory plugin in 5 easy steps

Jenkins and Artifactory integration can be a major timesaver for DevOps engineers. Follow these five steps for an easy plugin installation in your CI/CD pipelines.
Step-by-step RESTful web service example in Java using Eclipse and TomEE Plus

In this easy-to-follow JAX-RS tutorial, we provide a RESTful web service example in Java using Eclipse and TomEE Plus, where we go from development to testing in less than 15 minutes.
4 ways to upload a JAR to a JFrog Artifactory repository

Need to upload a JAR to a Maven repository after an artifact has been built? Here, we show you four ways to upload a file to a JFrog Artifactory repository.
How to deploy Docker Hub-hosted microservices in AWS ECS

In this AWS ECS tutorial, we take a Spring Boot app contained in a Docker Hub-hosted image and deploy the associated microservices in AWS using Elastic Container Service.
How to use the Jenkins Git Plugin: Tips and tricks

Being able to pull from a source code repository is a given, but here are five features the Jenkins Git Plugin makes available to your build jobs that you didn't even know were there.
How to Git started and use the Github Desktop app tool

The GitHub Desktop client has been around for a few years now. In this GitHub Desktop app tutorial, we take a look at how well the tool performs the five basic Git commands.
Tough sample DevOps interview questions and answers to tackle

Interested in applying for that DevOps engineer position? Then take a look at these tough, sample DevOps interview questions and answers, and see how well you are prepared.
How to set up and use a JFrog Artifactory as a local Maven repository

In this Artifactory tutorial, we'll show you how to deploy JAR files to an Artifactory Maven repository. It's surprisingly simple.
Let's dispel three common Java microservices myths

It's easy to develop Java microservices, but confusion over what they are and how they work tends to muddy the waters. Here, we clarify a few myths pertaining to Java microservices.
Tough sample Jenkins interview questions and answers for DevOps engineers

Applying for an engineering job where continuous integration is part of the description? Here are 10 tough Jenkins interview questions to prepare you for the DevOps engineering interview.
Maven Checkstyle Plugin example: How to enforce Java quality rules

Java Checkstyle rules can be applied to every build to ensure developers are following source code quality rules correctly. This Maven Checkstyle Plugin tutorial shows you how.
Step-by-step Spring Boot RESTful web services example in Java using STS

In a previous tutorial, we explained the basic tenets of good RESTful web service design. In this step-by-step Spring Boot restful web services example, we implement it.
A git reset hard example: An easy way to undo local commits and shift head

For those looking to undo a commit, the easiest way to do it is by using the git reset hard command. It's the easy way to reset the HEAD, the index and the working tree as well.
Jenkins parameterized build example with String and Boolean parameters

It's easy to customize your Jenkins jobs when you add parameters to the build. This Jenkins parameterized build example with Boolean and String parameters is the first step to a fresh continuous integration pipeline.
RESTful APIs tutorial: Learn key web service design principles

RESTful Java API designs shouldn't be hard to get right. This RESTful APIs tutorial shows core RESTful principles concerning URL structure and the effective use of HTTP methods.
Standardizing app staging a key benefit to a Java configuration API

Payara's Mike Croft talks about the potential benefits of making a Java configuration API a standard part of the Java EE specification.