Here's the answer to last week's quiz:
Line 03- "x" is a static variable which belongs to the class not to the objects.
A recent Java Council podcast moderated by Java Champion and Virtual JUG leader Simon Maple brought together a collection of familiar and high-profile Java community members that included Trisha Gee (Java Champion, JUG leader), Martijn Verburg (Java Champion, London JUG), Reza Rahman (Java EE Guardians, Philadelphia JUG), and the "Father of Java" James Gosling. Rahman and Gosling were given most of the hour, where Rahman's questions centered around the continuing efforts of the Java EE Guardians and Gosling was asked several thoughts about Oracle.
Listening to Gosling speak about Java is both fascinating and at least somewhat sad, as Gosling's concern for the fate of his legacy seems palpable through his word choice and delivery. This obviously wasn't the first time that Gosling has been asked to publicly share his thoughts on the state of Java and Oracle, but in this case, he did take the opportunity to clarify some past comments in order to clear up the depth of his disappointments.
We have just released an important update for all IntelliJ-based IDEs. This update addresses critical security vulnerabilities inside the underlying IntelliJ Platform. The vulnerabilities, in various forms, are also present in older versions of the IDEs; therefore, patches for those are also available.
While we have had no reports of any active attacks against these vulnerabilities, we strongly recommend for all users to install the update as soon as possible.
First of all I would like to make a disclaimer. I am not an expert in Go. I started to study it a few weeks ago, thus the statements here are kind of first impressions. I may be wrong in some of the subjective areas of this article. Perhaps I will write a review of this one later. But until then here it is, and if you are a Java programmer you are welcome to see my feelings and experiences and more than welcome to comment and correct me if I am wrong in some statements.Golang Is Impressive
As opposed to Java, Go is compiled to machine code and is executed directly. Much like C. Because this is not a VM machine it is very much different from Java. It is object oriented and at the same time functional to some extent thus it is not just a new C with some automated garbage collection. It is somewhere between C and C++ if we think the world of programming languages is linear, which it is not. Using a Java programmer’s eyes, some things are so much different that learning them is challenging and may give a deeper understanding on programming language structures and how objects, classes and all these things are … even in Java.
It's not just about InputSteam, this class is a good example of a bad design. I'm talking about three overloaded methods read(). I've mentioned this problem in Section 2.9 of Elegant Objects. In a few words, I strongly believe that interfaces must be "functionality poor." InputStream should have been an interface in the first place and it should have had a single method read(byte). Then if its authors wanted to give us extra functionality, they should have created supplementary "smart" classes.A Serious Man (2009) by Coen Brothers
This is how it looks now:
By now you’ve probably have heard of Java 9’s new module system a.k.a. project Jigsaw. If you don’t know about Java 9’s new module system, you should visit Mark Reinhold’s paper on The State of the Module System. Also, you should check out @nipafx Nicolai Parlog’s excellent blog at http://blog.codefx.org There he goes into great detail about Java 9’s new module system and many scenarios.
In this article I will attempt to show you how to create a JavaFX Helloworld application using Java 9’s module system in 60 seconds.
This one’s gonna be short. Honestly, I don’t know how last week’s article about static methods went so long.
Singletons get a bad rap, being called Anti-patterns, and for good reason. The biggest reason given against Singletons is that they’re global state, which is bad. If you want a stateful “Singleton”, there are ways to restrict the application to only having a single instance, even if the class can have multiple instances. While this still largely equates to global state, at least it opens up the possibility of test doubles and makes the “Singleton” itself that much easier to test.
I have had a good working experience using the Netflix Rx-Java libraries and have previously blogged about using Rx-Java and Java 8 CompletableFuture for scatter-gather kind of problems. Here I want to explore applying the same pattern using the Spring Reactor Core library.
If you are familiar with Netflix Rx-Java, you already know Spring Reactor Core. The API's map beautifully, and I was thrilled to see that the Spring Reactor team has diligently used Marble diagrams in their Javadoc API's
We are pleased to announce that the Spring AMQP 1.6 release candidate (1.6.0.RC1) is now available in the spring milestone repo.
The 1.5.6 maintenance release is also available with a few bug fixes.
One of the most profound insights I have learned about OO is that class design—the shaping of classes & types—is best informed by what processing needs to do, rather than the ‘kind’ of entities it goes between.
What we are talking about here is behavior, rather than trying to categorize entities at rest. Program code only acts by being executed; classes & interfaces (types) are a mechanism to dispatch that execution to specific methods.
We saw how we can do the restful Java Metering using Jersey event listeners (Read here) in one of our earlier article.
Here we are going to see how to use Dropwizard Metrics framework to do the metering of our restful resource methods. Dropwizard Metrics is using Jersey events listeners internally to achieve this. They have provided nice wrapper and lots of plug-in to gather the performance of each resource methods without much effort.
Let's imagine that we are developing a wrapper library for an API, which returns JSON documents as a response. And there are many endpoints that have similar structures, except some fragment and may have a different structure.
Let's go ahead with a simple example. This is what some personal data could look like:
I recently received an email from a well-known consulting firm that said, in essence, “You're a polyglot programmer, we're looking for those, let's talk.”