fidzu : Java

Learn more about the differences and similarities between hashing in Java and C++.

Java and C++ are somewhat syntactically similarly languages that have diverged over time. Java was loosely inspired by C++, but initially didn't adopt C++'s template structures, nor did it require C++'s header/content file separation, and of course, it used the JVM and compiled to bytecode rather than machine code.

13 Dec 2019 2:14pm GMT

Here's a detailed look at Project Loom.

Why Loom?

One of the drivers behind streams in Java 8 was concurrent programming.

You may also like: Project Loom: Java With a Stronger Fiber

13 Dec 2019 2:14pm GMT

Get started building a Spring Boot application with Spring Data JPA.

This guide includes my interest in how you can handle complex CRUD operations such a simple way with Spring Data JPA and using native queries in case of needs.

13 Dec 2019 2:14pm GMT

Learn more about deploying Java EE apps on Azure.

There is a multitude of options for cloud-based application development ranging from traditional IaaS (Infrastructure-as-a-Service), PaaS (Platform-as-a-Service), and CaaS (Containers-as-a-Service) all the way to Kubernetes and serverless. Think of it as a spectrum rather than a "one-size-fits-all" model, with each option having owned its pros and cons. Ultimately, every scenario is unique and the final choice is driven by requirements - but its always good to know that you have "choices" at your disposal!

You may also like: Java in Azure Functions

12 Dec 2019 2:30pm GMT

Learn more about matching patterns in Java.

12 Dec 2019 2:30pm GMT

There are a few hidden treasures within Eclipse collections.

Eclipse Collections is an open-source Java Collections framework. In this blog, I am going to demonstrate five lesser-known features of the framework. I published a similar blog in last year's Java Advent Calendar. Please refer to the resources at the end of the blog for more information about the framework.

You may also like: The Best of Java Collections [Tutorials]

12 Dec 2019 2:30pm GMT

Learn more about the different types of references in Java.

There are four types of references in Java. And for each of them, the garbage collector behaves a little bit differently.

Below, I will try to explain each type of reference's characteristics and possible use cases, specifically strong, weak, soft, and phantom references.

11 Dec 2019 3:21pm GMT

Learn more about building reactive Spring Boot apps and the Kotin RSocket server.

This is the eighth part of our tutorial showing how to build a Reactive application using Spring Boot, Kotlin, Java, and JavaFX. The original inspiration was a 70-minute live demo.

11 Dec 2019 2:52pm GMT

Hi, Spring fans! Welcome to another installment of This Week in Spring! I just wrapped up my appearance in Brisbane, Australia, where I have been for the epic YOW! conference. Truly, one of my all-time favorite shows on the planet. I feel like an imposter in the ranks of the other speakers. I cannot recommend this show enough.

I'm just about to board my fight back to San Francisco, and we've got a ton of stuff to get to, so let's press on!

11 Dec 2019 2:52pm GMT

Learn more about Smalltalk with GraalVM.

Today, we're going back to the future to do some Smalltalk with the GraalVM.

You may also like: Learning to Use GraalVM

Introduction

The Java HotSpot Performance Engine is one of the most sophisticated process virtual machines (VMs) available and used by millions of Java developers every day. If we go back in the early history of HotSpot, not many people may know that HotSpot was initially built by the same team that worked on Strongtalk, a strongly-typed Smalltalk environment as its name suggests.

11 Dec 2019 2:52pm GMT

Take control of your slow producers... with READ-BEHIND-CACHE!

In our connected world, we often use data from APIs that we don't own or don't have access to improve. If all things go right, their performance is good and everybody's happy. But too many times we have to use APIs that have less than optimal latency.

Of course, the answer is to cache that data. But a cache that you don't know when it gets stale is a dangerous thing, so that's not a proper solution.

10 Dec 2019 1:39pm GMT

Learn more about reading EDI data in this Java tutorial.

These days, most Java developers expect to deal with JSON to exchange data with other systems and businesses. However, what happens when JSON is not an option? It's easy to forget that there are other formats for data exchange, some of which are more difficult to handle. One such format is known as EDI. EDI itself comes in several flavors - for example, X12 and EDIFACT - so code to read it may not always be "one size fits all."

You may also like: [DZone Refcard] Understanding Stream Processing

On the surface, reading EDI data seems to be a simple endeavor. A developer may see a sample file and attempt to read it using the basic string parsing APIs available in his or her programming language's standard library. Unfortunately, this may not always work and it becomes difficult to do data validation and handle the structure of the document effectively.

10 Dec 2019 1:39pm GMT

Many of us are winding down for the end of the year. Or, more likely, desperately trying to hit deadlines before vacations, public holidays, or school breaks. This month's Java Annotated Monthly is not too full to take away from your busy schedules and designed (as usual) for you to skim over the topics and dive into just the ones that interest you. Good luck with the tail end of 2019!

Java News

• Project Loom: Helping Write Concurrent Applications on the Java Platform (video) - here's an overview of lightweight threads in Java (not yet available).
• New Java group proposed for IDE & tooling support - for OpenJDK, this group has been created.
• JEP 305: Pattern Matching for instanceof (Preview) - due in Java 14. No more nasty casting after an instanceof call!
• JEP 359: Records (Preview) - "Records are a new kind of type declaration in the Java language. Like an enum, a record is a restricted form of class." Also due in Java 14.
• Records feedback - here's comprehensive feedback from Stephen Colebourne on the proposal for records.
• JDK 14 Early-Access Release Notes - speaking of Java 14, here are the current release notes.
• The State of Java in 2019 - here are survey results on Java versions, frameworks, tools, etc.
• Why We Hate Java Serialization And What We're Doing About It (video)
• The Java Community Process Election Results
• Celebrating 20 Years of Java Community Collaboration - this includes an overview of what the Java Community Process is and how it works.
• Low Latency Profiling Now Available in Java 8 - Java Flight Recorder has been backported to Java 8 OpenJDK.

Java Tutorials & Tips

• Design gotchas in JDK's functional interfaces - this is not a recent article, but I stumbled over it and thought it was interesting to understand some of these subtleties.
• Java Feature Spotlight: Local Variable Type Inference - here's a thorough look at "var", what it is, how it works, and when to use it.
• A guide to Java versions and features - this is a comprehensive guide to the current status of Java versions, JDK versions and features from Java 8 onwards.
• Reasons to move to Java 11 - including new tools and performance improvements
• Name the Date - this is a great piece from the ever-entertaining Kevlin Henney on why naming is important.
• Java's Unspeakable Types - when is a type not a type?
• 2048FX - a JavaFX version of the game 2048
• Understanding Garbage Collectors - an overview of GC and how some specific garbage collectors work from December's Java Magazine.

Languages, Frameworks, Libraries, and Technologies

• Hello Kotlin - here's yet another introduction to Kotlin!
• Stop Mapping Stuff in Your Middleware. Use SQL's XML or JSON Operators Instead - it is possible to use SQL to get your data into the right shape before it gets to your application.
• What I learned about Quarkus in two months - in case you need a quick overview of Quarkus and more, you can read one article a day in December on the JVM Advent Calendar!
• Adopting a Cross-Platform Strategy for Mobile Apps using Kotlin multiplatform - check it out!
• A Deep Dive into the KotlinVersion Class
• Writing Your First IntelliJ IDE Plugin with Kotlin
• Introducing Kotlin at ING, a long but rewarding story - a case study of how a bank adopted Kotlin.
• Announcing Cloud Debugging (beta) for JetBrains IDEs - this is a new feature for the AWS plugin. In related news, the AWS Toolkit is now available for Rider (.NET).
• Get started with the new Kotlin Azure Functions Archetype and IntelliJ IDEA
• Running Your Jupyter Notebooks on the Cloud - Java-based Jupyter notebooks via Oracle Cloud Infrastructure.

Culture & Community

• Breaking the "senior developer" ceiling - "Optimize your impact, not output." This post is really interesting, but if the company can't understand/measure your impact and only measures your output, this might not help you.
• Training Engineering Managers: This Is The Way to Keep Growing - you can't simply promote developers to management positions and expect them to succeed.
• Coding the Future Coders - a reminder that how we market ourselves has a big impact on the type of people we encourage into the industry
• Creating Psychological Safety in the Workplace (podcast with transcript) - really interesting discussion about why psychological safety is important
• Dave Farley on Taking Back Software Engineering (podcast with summary) - including "five foundational principles for software engineering that will be durable, broadly applicable and broadly acceptable"
• What to Wear on Stage - tips for speakers, particularly applicable to women but plenty in there to consider if you don't identify as female. I've also covered this topic.
• The Cloud-Native Diabolical Developer by Martijn Verburg (video) - a very tongue-in-cheek presentation about What To Worry About As A Developer.
• Use Testing to Develop Better Software Faster - testing is good not only because, you know, it tests things, but also because it helps us reason about our software.
• Good and Bad Technical Debt (and how TDD helps) - an older article, but a good view on technical debt.
• To fix Climate Change, stop being a techie and start being a human - is there something we, as techies, can do about climate change?
• The 7 Types Of Power That Shape The Workplace
• Reflections on One Year in as a Developer Advocate; Advocating for Developers - if you're interested in what developer advocates do, this is an interesting post!
• Book Report: Developer Advocate! - while we're on the topic, there's a new book out interviewing developer advocates (Disclaimer: I am featured in this book)

And Finally

A chance to catch up on the other IntelliJ IDEA blog posts from this month.

10 Dec 2019 1:39pm GMT

In this edition of "Best of DZone," we've compiled our best tutorials and articles on one of the most popular APIs in Java, Streams. Whether you're a beginner just looking to bring in some elements of functional programming into a Java application, or a Streams vet, we've got your back!

Before we begin, we'd like need to thank those who were a part of this article. DZone has and continues to be a community powered by contributors like you who are eager and passionate to share what they know with the rest of the world.

09 Dec 2019 8:45pm GMT

Spring Data JPA was created primarily to allow easy query creation with query generation by method name. However, sometimes, we need to create complex queries and cannot take advantage of a query generator.

The Spring Data JPA provides a repository programming model that starts with an interface per managed domain object. Defining these interfaces serves two purposes: first, by extending the JpaRepository, we get a bunch of generic CRUD methods, like save, findAll, delete, and so on. Second, this will allow the Spring Data JPA repository infrastructure to scan the classpath for this interface and create a Spring bean for it. A typical repository interface will look something like this:

09 Dec 2019 5:13pm GMT

Let's look at the difference between the inheritance and delegation concepts.

In this article, we will look at the difference between the inheritance and delegation concepts. Or, to put it better, why I prefer delegation and why I want to emphasize this rarely-used feature in Java.

You may also like: Problems With Inheritance in Java

The Challenge

The challenge we face today is quite common in the field of graphic user interfaces like desktop- or web-apps. Java is widely used as the development language for both worlds, and it does not matter if we are in the classic swing, JavaFX, or the field of web frameworks like Vaadin. Explicitly, I've opted for a pseudo-class model in core Java, as I'd like to look at the design patterns here without any technical details.

09 Dec 2019 2:01pm GMT

From the Ceylon dept.:

Gavin King of Red Hat/Hibernate/Seam fame recently unveiled the top secret project that he has been working on over the past two years, a new language and SDK designed to replace Java in the enterprise. The project came out of hiding without much fanfare or publicity at QCon Beijing in a keynote titled "The Ceylon Project - the next generation of Java language?".

10 Nov 2011 6:01am GMT

From the Yet Another dept.:

To further its commitment to the Java Community Process (JCP), Oracle has submitted the first of two Java Specification Requests (JSRs) to update and revitalize the JCP.

10 Nov 2011 6:01am GMT

From the Fact Checking dept.:

ZDNET: Sometimes the sheer wrongness of what is posted on the web leaves us speechless. Especially when it's picked up and repeated as gospel by otherwise reputable sites like Engadget. "Google copied Oracle's Java code, pasted in a new license, and shipped it," they reported this morning.



Sorry, but that just isn't true.

10 Nov 2011 6:01am GMT

From the Grande dept.:

Oracle today announced the availability of Java Platform, Standard Edition 7 (Java SE 7), the first release of the Java platform under Oracle stewardship.

10 Nov 2011 6:01am GMT

From the Jitters dept.:

The next edition of Java has been approved by a Java Community Process executive committee, but not without some acrimony.

10 Nov 2011 6:01am GMT

From the JDK dept.:

After an initial round of testing we've declared build 147 to be the first Release Candidate of JDK 7.



There are only thirteen changes in this build. Over half of them are administrivial updates that don't affect the actual code; the remainder are true showstoppers, including several hard VM crashes and a JIT correctness bug identified by an Eclipse unit test.

10 Nov 2011 6:01am GMT

From the Counter dept.:

Google has filed its answer to Oracle's amended complaint and its memorandum opposing Oracle's Motion to Dismiss. And we find out why Google didn't just roll over and pay Oracle for a license. Oracle asked in its motion to dismiss that the counterclaims alleging that Oracle's patents are invalid be dismissed. So Google explains more thoroughly why it believes they are in fact invalid. First, Google asserts:



Each of the Patents-in-Suit is invalid under 35 U.S.C. § 101 because one or more claims are directed to abstract ideas or other non-statutory subject matter.

10 Nov 2011 6:01am GMT

From the Dis Harmony dept.:

The Apache Software Foundation - one of tech's most influential open-source groups - is closer to quitting Java's governing body after losing a stand-off vote against Oracle on Java.



The Reg has learned that with 75 per cent of qualifying Java Community Process (JCP) members having voted on whether to ratify Oracle's proposed roadmap for Java 7 and 8, Oracle's plan has been accepted.

10 Nov 2011 6:01am GMT

From the So Long dept.:

The Apache Software Foundation has resigned its seat on the Java SE/EE Executive Committee. Apache has served on the EC for the past 10 years, winning the JCP "Member of the Year" award 4 times, and recently was ratified for another term with support from 95% of the voting community. Further, the project communities of the ASF, home to Apache Tomcat, Ant, Xerces, Geronimo, Velocity and nearly a 100 mainstay java components have implemented countless JSRs and serve on and contribute to many of the JCPs technical expert groups.



We'd like to provide some explanation to the community as to why we're taking this significant step.



The recent Java SE 7 vote was the last chance for the JCP EC to demonstrate that the EC has any intent to defend the JCP as an open specification process, and demonstrate that the letter and spirit of the law matter. To sum up the issues at stake in the vote, we believe that while continuing to fail to uphold their responsibilities under the JSPA, Oracle provided the EC with a Java SE 7 specification request and license that are self-contradictory, severely restrict distribution of independent implementations of the spec, and most importantly, prohibit the distribution of independent open source implementations of the spec. Oracle has refused to answer any reasonable and responsible questions from the EC regarding these problems.

10 Nov 2011 6:01am GMT

From the DisHarmony dept.:

After the resignation of Apache from the Java SE/EE Executive Committee, the time has now come for Harmony to be added to the Apache Attic. Harmony was 'the project to produce an open source cleanroom implementation of Java.' An open vote was taken within the Project Management Committee, which resulted in a 20-2 majority to discontinue development.

10 Nov 2011 6:01am GMT

The major update to YourKit Java Profiler has been released. Version 7.0 includes

10 Nov 2011 6:01am GMT

Sun will gradually phase out mobile Java (Java Micro Edition) and move respective services to Standard Edition. "We're trying to converge

10 Nov 2011 6:01am GMT

The development kit and API for Google mobile platform, Android, has been released.

10 Nov 2011 6:01am GMT

Sun has started an early access program to Java SE 6 Update N (formerly known as the "Consumer

10 Nov 2011 6:01am GMT

New version of pure Java IDE has been released, with support for many new

10 Nov 2011 6:01am GMT

We wish a Happy New Year to all our readers and contributers. Hope to see you all in 2008.

10 Nov 2011 6:01am GMT