Core Java APIs and programming techniques
Technologies related to Java APIs (application programming interfaces) and JDK (Java Development Kit) form the cornerstone of modern, enterprise-grade software development. Here we explore all the Java features that make the JVM great through programming tutorials, real-world code samples and expert opinions from Java champions.
Top Stories
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Tutorial
15 May 2025
Learn how to use concurrency in Go with this tutorial
The Go language is designed for simplicity, including its approach to concurrency. In this tutorial, learn to perform multiple tasks using goroutines, channels and synchronization. Continue Reading
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Tip
30 Apr 2025
10 best API testing tools to know
API testing tools are essential for ensuring reliable, high-performing APIs in modern software development. Choose API testing tools that suit your tech stack and workflow. Continue Reading
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Podcast
09 Jan 2018
Fearless enhancement of legacy Java code with new SE features
While the Java SE 9 release has everyone talking about new features and syntax enhancements, JNBridge's Wayne Citrin insists legacy Java developers need not feel left behind. Continue Reading
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Feature
27 Dec 2017
What thought leaders were saying about Java SE 9 in 2017
Understandably, Java SE 9 was a popular topic of discussion in 2017, but so were DevOps and cloud native, according to this list of the 10 most popular podcasts of 2017. Continue Reading
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Blog Post
22 Nov 2017
The impact of Java SE 9 on operations and development teams
Just prior to JavaOne, TheServerSide spoke with ZeroTurnaround's Simon Maple about all of the things going on with Java SE 9 and the greater Java ecosystem. A couple of interesting articles eluted ... Continue Reading
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Feature
06 Nov 2017
Owning the Java Platform is more of a burden or a blessing
Oracle became stewards of the Java platform as a by-product of their acquisition of Sun Microsystems. But looking back, it seems that the Java Platform has been more of a burden than a blessing. Continue Reading
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Podcast
18 Oct 2017
Migrations to Oracle's Java SE 9 platform may be delayed
Oracle did a great job getting Java SE 9 released earlier this year, but modularity and various smaller updates may not be enough to get users to quickly migrate to JDK 9. Continue Reading
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News
10 Oct 2017
Java 18.3 marks the future of Java at JavaOne 2017
At JavaOne 2017, Oracle identified four projects that will have a significant impact on the future of Java: Project Valhalla, Project Panama, Project Amber and Project Loom. Continue Reading
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News
06 Oct 2017
Java modules and Project Jigsaw a source of JavaOne 2017 pride
It wasn't easy getting Project Jigsaw ratified, but it is now part of the Java SE 9 package, and Oracle executives at JavaOne 2017 couldn't be prouder. Continue Reading
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News
05 Oct 2017
Azure Functions, Project Fn shine at JavaOne 2017
At JavaOne 2017, Microsoft previews its Azure Functions serverless offering with support for Java; Oracle introduces Project Fn, which runs across multiple clouds and also supports Java. Continue Reading
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Podcast
03 Oct 2017
Oracle VP talks Java EE 8, Java platform update at JavaOne
Will the future involvement of the Eclipse Foundation lead to a faster and more nimble Java platform update process? Oracle's Michael Lehmann believes it will. Continue Reading
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News
02 Oct 2017
Java SE 9, OpenJDK energize Java community at JavaOne 2017
From the release of Java 9 to the GPL of OpenJDK builds, recent Oracle announcements have energized the Java community, creating a palpable positivity at JavaOne 2017. Continue Reading
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News
02 Oct 2017
Keynote speakers open up at JavaOne 2017
From the release of JDK 9 to the open sourcing of serverless programming technologies, the JavaOne 2017 keynote paved a path for a progressive future. Continue Reading
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Opinion
28 Sep 2017
JavaOne 2017 walks a new path
It always left a bitter taste in my mouth seeing JavaOne relegated to a bunch of hotels by San Francisco's Union Square while OracleWorld filled the Moscone building. It's nice to see JavaOne 2017 and Oracle OpenWorld now sharing the same convention center. Continue Reading
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Feature
28 Sep 2017
JavaEE 8 and Java 9 trending large at JavaOne 2017
What are the big trends in the Java world today? Just look at the JavaOne 2017 schedule and you'll see it goes way beyond just JavaEE 8 and the new Java 9 release. Continue Reading
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News
25 Sep 2017
Oracle releases Java 9, Java EE 8
Oracle released the long-awaited Java 9, along with Java EE 8 -- each with key improvements to simplify the development process using the language, including modularity in Java 9. Continue Reading
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News
14 Sep 2017
Oracle moves Java EE to Eclipse Foundation
In an effort to spur innovation and collaboration on the Java EE platform, Oracle has enlisted the help of IBM and Red Hat in moving Java EE to the Eclipse Foundation. Continue Reading
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News
12 Sep 2017
Calling 'all aboard' on the six-month Java release train
If Oracle moves to a six-month Java release cycle instead of the existing feature-driven one, what happens next? We talk to Azul's Gil Tene about Mark Reinhold's proposal. Continue Reading
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News
31 Aug 2017
CloudBees eases the DevOps journey with DevOptics
CloudBees has introduced DevOptics, a tool that provides end-to-end insight into application delivery streams, helps to identify problems and eases the overall DevOps journey. Continue Reading
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Feature
28 Aug 2017
The hidden threat lurking in an otherwise secure software stack
All it takes is a fork from the main branch and a re-branding of the code, and the next thing you know, there's a hidden threat in your software. Here's how to protect against it. Continue Reading
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Feature
10 Aug 2017
Effective DevOps change management for versioning cloud apps
There are many ways to go about versioning your cloud applications, but new approaches may need to be implemented when performing DevOps change management. Continue Reading
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News
01 Aug 2017
Coding Dojo adds full-stack Java developer course, drops Rails
Programming boot camp Coding Dojo has abandoned its Ruby on Rails training courses and launched higher-demand, full-stack Java developer courses for job seekers. Continue Reading
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Feature
10 Jul 2017
Effective approaches to mentoring women in tech
Mentoring women and men alike is a great way to enhance the talent of existing employees. Here are some ideas on how to make mentorship efforts effective for everyone, with an emphasis on inclusion for all. Continue Reading
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News
29 Jun 2017
IBM, Lightbend team up on cognitive application development platform
IBM and Lightbend join forces to help bring microservices to IBM's WebSphere platform, with new Scala- and Java-based tools for cognitive application development. Continue Reading
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Feature
19 Jun 2017
How cheap eye tracking software changes the app development game
Find out what the advent of low-cost eye tracking software means for the future of both marketing and application development. Continue Reading
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Feature
14 Jun 2017
Changing lives through improved application performance
Find out how Cure.org improved application performance management to fine tune their website, increase donations, and make a difference around the world. Continue Reading
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Tip
09 Jun 2017
Improving plant production performance with IT in the agriculture industry
How is big data and IT helping the agriculture industry? By looking at information in new ways, technology is helping to improve plant production performance. Continue Reading
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Blog Post
19 Apr 2017
Java 9 will finally give the term 'deprecated' meaning
They are finally pruning away deprecated methods out of Java 9. The deprecated value will now have deprecated meaning. Continue Reading
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Opinion
11 Apr 2017
Is fear-mongering driving the adoption of microservices and containers?
Nobody questions the importance of microservices and containers, but is unfettered advocacy becoming problematic? Continue Reading
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Opinion
30 Mar 2017
Stop adding web UI frameworks like JSR-371 to the Java EE spec
Java EE's Servlet and JSP API provide a fine foundation for handling a web-based request-response cycle. Adding UI frameworks like JSR-371 to the spec only causes problems. Continue Reading
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Opinion
24 Mar 2017
Does reading XML while writing JSON make me a bad person?
I'm always writing JSON code, loving its flexibility and forgiveness. But when I call an external service, I want to be reading XML. Does that make me a bad person? Continue Reading
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Blog Post
22 Mar 2017
Java EE makes best-of-breed software conglomerations a thing of the past
Looking back at some of the Frankenstein-esque applications that were built using different frameworks, it's good to know there's no need for best-of-breed. Continue Reading
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Blog Post
13 Mar 2017
IoT developers face critical questions when digitally transforming cities
Digitally transformed smart cities are the wave of the future, there’s no doubt about that. But the road to a more connected municipality is far from clear. Although there are some common ... Continue Reading
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Blog Post
27 Feb 2017
How to win at an IoT hackathon
Unlike most technology hackathons, this event kept a laser focus on the commercial side of technical innovation. What was the outcome of this IoT hackathon? It was a very tight race. Continue Reading
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Blog Post
22 Feb 2017
Arguing the business case for IoT adoption
As an increasing number of businesses embrace IoT adoption to create more efficiency, reach new market segments, and innovate for the future, they are facing challenges along the way. Continue Reading
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News
17 Feb 2017
How deep learning and AI techniques accelerate domain-driven design
Is the codebase aligned with the enterprise model? Deep learning and other AI technologies are helping to align domain-driven design with the organization's business objectives. Continue Reading
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Feature
31 Jan 2017
Industrial IoT the newest hotbed for edge device innovation
As IoT devices saturate the home market, the latest hotbed for edge device innovation is the often overlooked world of industrial IoT (IIOT). Continue Reading
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Blog Post
26 Jan 2017
IoT entrepreneurship on display at North Texas hackathon
What better way to promote IoT entrepreneurship than by sponsoring a hackathon and awarding prizes that come with business development guidance to the winners? Continue Reading
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Feature
02 Jan 2017
Top 5 challenges a successful IoT hackathon must overcome
Tahir Hussain, CEO of Collide Village, made it clear that running an IoT hackathon is no easy task. Here's what had to be overcome to make the IoT event successful. Continue Reading
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Feature
29 Dec 2016
Successful DevOps transitions are literally taking off
With 1,400 systems to integrate, American Airlines had their work cut out for them when they decided to embark upon a DevOps transition. Continue Reading
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Video
08 Dec 2016
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. Continue Reading
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Feature
01 Dec 2016
From chatbots to IBM's Watson: How software deals with conversational language
The next big thing in software development is conquering the conversational language development hurdle. Here's how the big players are currently doing it. Continue Reading
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News
05 Oct 2016
Pros and cons of a DIY approach to contributing to open source efforts
Everyone wants to contribute to open source projects, but few consider the risks. Salesforce evangelist James Ward outlines the legal and security risks involved. Continue Reading
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News
21 Sep 2016
Just like last year, JavaOne 2016 showcases Java 9 enhancements
With no particularly new announcements surrounding the Java platform, JavaOne 2016 has a more subdued feel than conferences in years past. Continue Reading
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News
21 Sep 2016
The future of Java promises a cleaner, more readable syntax
Java has always been derided as being too verbose, especially when compared with languages like Groovy or Scala. But, according to Brian Goetz, that's all about to change after Java 9. Continue Reading
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Feature
12 Sep 2016
How wearable apps are influencing the future of software design
As new wearable applications are constantly emerging in the marketplace, their development and design are changing how software is being written. Experts discuss the future of apps. Continue Reading
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Opinion
22 Aug 2016
The reasons the COBOL language is irrelevant -- and why Java's okay
Word in the Java community is that it is slowly becoming outdated. Some beg to differ, including those who suggest that COBOL is the dying language. Continue Reading
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Feature
25 Jul 2016
Java evolution into a functional programming language reflects demand
Many changes have come to the Java languages over the years, with Project Coin and lambda support making it more of a functional programming language. Continue Reading
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Feature
06 Jun 2016
Java's lambda syntax rigidity exposes spoiled programmer's frailties
Consternation over Java's lambda syntax is the perfect example of how Java's evolution and incremental improvements have created a community of spoiled programmers. Continue Reading
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Feature
24 May 2016
Best programming languages for enterprise development
There's no shortage of choice when selecting the best programming languages for back-end apps. Learn what the ultimate decision depends on. Continue Reading
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Feature
23 May 2016
Why Java is the most popular programming language
Roger Smith examines why 20 years after its release, Java tops the TIOBE index as the most popular programming language. Continue Reading
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Feature
28 Apr 2016
Deep machine learning can help clean the mess of big data
Turning a wave of information into something meaningful can be challenging. But that's where deep machine learning can help. Here, expert George Lawton explains how. Continue Reading
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Feature
31 Mar 2016
Public PaaS and private SaaS offerings accelerate DevOps adoption
Be it an online Git repository, or a private CI server run on OpenStack, a variety of compelling public and private SaaS and PaaS offerings are helping to accelerate DevOps adoption. Continue Reading
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Feature
30 Mar 2016
Kotlin makes a splash in the crowded pool of peripheral JVM languages
From Groovy to Scala, there is no shortage of peripheral JVM languages from which to choose, but JetBrains' Kotlin provides some compelling features that just might make it right for your next project. Continue Reading
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Podcast
15 Mar 2016
JVM language Kotlin simplifies Android app development
JetBrains, a company known for its popular IntilliJ and RubyMine IDEs, has released Kotlin, a new JVM language set to simplify both server-side and Android-based development. Continue Reading
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Tutorial
29 Feb 2016
How to install JDK 8 and write the Java Hello World application
In this tutorial, we look at how to set up a basic Java SE development environment by installing JDK 8, after which we write, compile and run the Java Hello World application. Continue Reading
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Tutorial
29 Jan 2016
How to use Java conditional statements effectively
Our first tutorial on learning Java left room for improvement. Here are ways to use Java's if, else and switch statements more effectively. Continue Reading
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Tutorial
29 Jan 2016
Comparing Java and JavaScript: Advanced conditional logic
How do the conditional logic semantics of Java and JavaScript compare? In a browser versus JVM language comparison, this is one place where the two languages are very similar. Continue Reading
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Tutorial
29 Jan 2016
This Java programming example will help you learn the language
Learning Java in a way that is both fun and effective is possible. In this tutorial, we take a problem-based approach to developing a stand-alone Java application. Continue Reading
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Tutorial
29 Jan 2016
Learning modern programming languages like Ruby made easy
Interested in learning Scala, Ruby, Java or JavaScript? Do you want to learn one of these modern programming languages quickly? Here's a strategy to help you do just that. Continue Reading
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Tutorial
29 Jan 2016
Learning Ruby for Java developers: A comparative tutorial
This comparative tutorial helps you learn how to program in Ruby, while also showing differences and similarities with Java. Continue Reading
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Tutorial
29 Jan 2016
How to perform conditional logic effectively with Ruby
Our first Ruby versus Java tutorial offered some refactoring opportunities. Here we look at using Ruby's if, elsif and case statement more efficiently. Continue Reading
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Tutorial
29 Jan 2016
Understanding JavaScript for the Java developer
After writing a simple application in a Java tutorial, we now move to the world of JavaScript, contrasting the languages to make the learning process easier. Continue Reading
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Feature
13 Jan 2016
Why learning Scala, JavaScript and Ruby will make you a better Java developer
Obviously a JVM stack developer is going to know Java. But in this world of polyglot programming, knowing a bit of JavaScript, Ruby and Scala as well is a must. In fact, it might even make you a better Java developer. Continue Reading
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Feature
03 Jan 2016
Simplified messaging and microservice development with PHP's PSR-7
Here we take a look at PHP's PSR-7, and how this new specification will help simplify microservice development while enhancing application messaging at the same time. Continue Reading
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Feature
22 Dec 2015
Learn why Azul Zing is the Editors' Choice for Innovation
Azul Zing collects garbage out of enterprise Java workloads. Learn more about this innovative product. Continue Reading
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News
10 Dec 2015
Payara founder: GlassFish Open Source a great app server
At JavaOne 2015, Steve Millidge discusses expectations for the future and what he and Payara are working on with GlassFish Open Source. Continue Reading
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Feature
10 Dec 2015
These new features in PHP 7 will convince you to do an upgrade
There have been some significant improvements to the PHP language. In this article we show you how to take advantage of them, and potentially convince you to do an upgrade and migrate to the new version. Continue Reading
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News
10 Dec 2015
Java turns 20: What's in store for Java programming?
Barry Burd, author and Java expert, discusses how Java programming recently turned 20 years old how it's managed to stick around for so long. Continue Reading
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News
01 Dec 2015
How to setup a local Maven repository server for artifact hosting
This article looks at how to setup a local Maven repository, along with the functionality a local Maven repository server should provide. Criteria for choosing a private, local Maven repository are listed, along with Maven tutorials on how to setup Artifactory and Nexus. Continue Reading
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Feature
10 Nov 2015
Containers and microservices take center stage as Devoxx 2015 kicks off
Containers like Docker, and microservice development, are the big topics at Devoxx 2015, but with more session rooms than every, there's plenty of other great fare for Java professionals. Continue Reading
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Feature
09 Nov 2015
JavaOne 2015 was the right time to dig into Java 9 JDK features
JavaOne 2014 was all about the Java 8 release, so it's understandable that JavaOne 2015 was all about Java 9. Here we take a look at what's new in Java 9, and even look forward towards things that might get included in Java 10. Continue Reading
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Tip
04 Nov 2015
Learn what the new Java EE security API means for developers
The new Java EE security API is a proposal for baking better security into Java EE, and could ease many security implementation headaches. Continue Reading
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Feature
02 Nov 2015
Top 7 Java platform takeaways from JavaOne 2015
What were the big takeaways from JavaOne 2015 with regards to the Java platform? Here we take a look at seven key insights garnered from this year's JavaOne and Oracle Open World conferences. Continue Reading
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Feature
01 Nov 2015
Valhalla and value types to change the way developers code in Java
In 2014, just as Java 8 was released, JavaOne was looking towards the future and talking about what was coming with Java 9. In 2015, Java 9 is still in the future, but that hasn't stopped the architects at Oracle from prognosticating about what might get included in Java 10. Continue Reading
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News
28 Oct 2015
Performance upgrades and feature enhancements typify incremental Java releases
There may not have been a major Java release since last year, but at JavaOne2015, there are still plenty of performance upgrades and feature enhancements for platform architects to boast about. Continue Reading
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News
27 Oct 2015
Oracle takes ALM to the cloud with the Java SE Cloud Service
Optimized for the cloud, at JavaOne2015, Oracle has announced the Java SE Cloud Service and a new set of developer tools that will simplify application lifecycle management by taking ALM to the cloud. Continue Reading
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News
26 Oct 2015
Celebrating 20 years of Java technology at JavaOne 2015
Twenty years is a pretty significant milestone, especially if you're a programming language. At JavaOne 2015, everyone is celebrating the 20th anniversary of the Java programming language, and looking ahead at the challenges another 20 years will bring. Continue Reading
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News
15 Oct 2015
Barry Burd's guide to the best sessions to attend at JavaOne 2015
Going to JavaOne this year? Wondering which sessions to attend? Conference veteran Barry Burd is here to help guide your way through Oracle's big conference in San Francisco. Continue Reading
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Podcast
17 Sep 2015
Network capacity management still a challenge for apps
Network capacity management challenges are increasing at a faster rate than ever with the robustness of the Internet of Things. Continue Reading
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Feature
11 Sep 2015
Introducing Amazon Echo - Adding voice recognition to your Java programs
Want to add voice recognition to your Java apps? You can do it with Amazon echo. Continue Reading
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Podcast
27 Aug 2015
Redis creator signs with vendor amid community support
How did the Redis community feel when the creator of their coveted NoSQL database signed on with a commercial vendor? TheServerSide talks to Salvatore Sanfilippo to find out. Continue Reading
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Tip
24 Aug 2015
Tracking DevOps metrics can increase business agility
Tracking DevOps metrics is one of three steps that can help improve the application development process and increase business agility. Continue Reading
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Feature
20 Jul 2015
IoT device startup creates customizable sensors
Learn how Notion, an Internet of Things startup, built a sophisticated tier of server applications to empower a new generation of customizable sensors. Continue Reading
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Feature
07 Jul 2015
How to create secure and bug free software using customer-driven development
When using the Agile method, development is largely customer-driven. How do you ensure the success of such a project? Here are some tips on how to develop secure, bug free software. Continue Reading
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Feature
15 Jun 2015
When loose coupling and SOA style software layering doesn't make sense
Loose coupling and adding in SOA style layers don't make sense unless an application is going to be distributed. If enterprise wide distribution isn't in your application's future, stop adding in extra complexity, and collapse those layers into something easier to build and maintain. Continue Reading
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News
01 Jun 2015
Google's Project Soli replaces the keyboard and mouse with radar and logic
Very little has been done to truly replace the utility of the keyboard and mouse, but Project Soli is working to change that. The new Google project looks to combine machine intelligence with radar and similar technology to read hand signals and control the Internet of Things (IoT). Continue Reading
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News
21 May 2015
Open source initiatives saving grace for many companies
Companies are realizing that IT can't write all the code needed. They are learning to write less code and do more with open source initiatives. Continue Reading
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News
20 May 2015
Guiding design tenets behind OpenStack software
The importance of OpenStack design tenets is not lost on developers. Following these tenets drives the development and evolution of OpenStack software. Continue Reading
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News
20 May 2015
DevOps software development promise aided by OpenStack
The promise of DevOps software development is being helped along by OpenStack, which is creating more opportunities for automation of operations. Continue Reading
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Feature
23 Apr 2015
Mobile development looks inwards as internal facing apps gain traction
As enterprise moves forward to provide employees with the apps they need for maximum productivity, everything is on the table for reinvention. A mix of standardized and customized solutions will be required by big business to meet the needs of an internal workforce that is ready to truly mobilize. Continue Reading
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Feature
03 Apr 2015
Docker and containerization: The uncontainable trend of 2015
Containerization, especially using new and exciting platforms like Docker, is a massive trend in the industry. Find out how to leverage this trend to run applications, host operating systems and gain even more benefits from running in a fully virtualized environment. Continue Reading
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Tip
26 Mar 2015
Successfully managing software quality with growing, globally distributed teams
Successfully managing a software project is always a challenge, but when a project grows into a globally distributed development effort, application lifecycle management (ALM) becomes a real challenge. So how does Liferay, an open source, enterprise portal do it? Senior software architect Ray Auge tells us how. Continue Reading
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Feature
25 Mar 2015
Cloud computing and AWS form perfect test beds for the risk averse
Risk aversion is a cornerstone of the enterprise computing community. Do no harm is philosophy that goes beyond medicine's Hippocratic oath. But the risk averse can now safely try new technologies by using cloud computing options and AWS. Continue Reading
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News
18 Mar 2015
Java 9 promises modularity and new value types
Modularity and new value types could come with Java 9. This could mean improved startup performance and easier programming of arrays. Continue Reading
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Tip
16 Feb 2015
Java platform: Invigorating robustness and simplicity
Java platform architects reminisce about the design of Java and how the platform is being pushed forward. Continue Reading
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Feature
15 Jan 2015
Will value types and structured arrays be Java 9's cap feather?
Scalability and performance are always issues that dog the Java platform. But with so many lessons learned from languages like Scala and Clojure, will Java 9 take on these scalability issues by introducing immutable types like structured arrays and value types? Continue Reading
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Tutorial
07 Sep 2014
Advanced JSF Tutorial: The single page interface (SPI) with Facelets, Ajax and HTML5
Some say it's impossible, but if you really understand the technology, you will realize that creating a single page interface (SPI) with JSF, Facelets, Ajax and HTML really isn't all that hard. In fact, JavaServer Faces makes it pretty easy! Continue Reading
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Tutorial
31 Aug 2014
JSF Tutorial: Completing the Ajax based Facelets application
If you're using JSF, you're probably using Facelets, and if you're creating modern web based applications, you'll likely want to use Ajax based request-response cycles. Here we conclude our tutorial on JavaServer Faces, Facelets and Ajax based programming. Continue Reading
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Feature
28 Jul 2014
Top 5 Java based tools for capturing business intelligence (BI)
There are many tools out there for working with BI, but here we look at the top five Business Intelligence tools that are written using the Java language. Continue Reading
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Tutorial
19 Jul 2014
An introduction to template building with Facelets, CSS, HTML and JSF 2.2
Facelets is a great technology for creating templates for websites and then adding dynamic functionality. In this tutorial, we will introduce the idea of creating a template page with CSS, HTML, JavaScript and JavaServer Faces 2.2 (JSF). Continue Reading
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Feature
30 Jun 2014
Static code analysis with Klocwork
Klocwork engineer Larry Edelstein discusses how to bring the most value to your static code analysis. Continue Reading