For those occasions when one storage account just won't do

JavaScript is one of the most important languages today. Let's take a look at how JavaScript has evolved in its short history and where it is headed next.

Bogged down with Java errors? This series presents the 50 most common compiler errors and runtime exceptions that Java devs face, and how to conquer them.

Java is changing the world around us in major ways. Here is how.

Automated deployment doesn't have to be difficult. Learn how to use the Mule management console and Maven to achieve automated deployment.

If you wonder what a JMF player is, you are in the right spot. We've noticed that many aspiring developers want to try it out but are unsure how it works. Hence, we decided to put together this guide to make things a tad easier for you. package org.jmf.example; import javax.swing.JDialog; import javax.swing.JFrame; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; import javax.swing.plaf.metal.MetalLookAndFeel; public class ExampleJMF { public static void main(String[] args) { JFrame.setDefaultLookAndFeelDecorated(true); JDialog.setDefaultLookAndFeelDecorated(true); try { UIManager.setLookAndFeel(new MetalLookAndFeel()); } catch(UnsupportedLookAndFeelException e) { e.printStackTrace(); } new exampleFrame(); } } But before we dive into it, let's answer this crucial question: What is Java? Java is a high-level language that programmers use to develop projects with few implementation dependencies. Java has transformed the web in many ways. A vast majority of online tools that we use today were built on Java. That includes websites mobile apps and multimedia playback platforms. This programming language has come a long way. This year it will be 27 years since James Gosling developed it. What is a Java Media Framework JMF is an API that enables you to play, process, and capture media audio and video. Whether you want to transmit or receive live media broadcasts and conduct videoconferences, you can easily do it thanks to this API. All thanks to RTP ”Real-time Transport Protocol of the JMF. A JMF is a straightforward player that encapsulates your multimedia component and allows you to control your player. It also offers methods that enable you to acquire necessary resources and query the current state. These are tools you will use to build page objects. For instance, if you want to scan the page and create a class. Here is what Java Media Framework can do: A multifunctional tool A JMF comes in handy, especially if you're looking for a tool that can scan a page and build a class. You can also use it to create prototype code and later build a robust application. Instrumentalization A lot of what you read about the topic of Observability mentions the benefits and potential of analyzing data, but little about how you collect it. This process is called “instrumentation” and broadly involves collecting events in infrastructure and code that include metrics, logs, and traces. There are of course dozens of methods, frameworks, and tools to help you collect the events that are important to you, and this post begins a series looking at some of those. This post focuses on introductory concepts, setting up the dependencies needed, and generating some basic metrics. Later posts will take these concepts further. An Introduction to Metrics Data Different vendors and open source projects created their own ways to represent the event data they collect. While this remains true, there are increased efforts to create portable standards that everyone can use and add their features on top of but retain interoperability. The key project is OpenTelemetry from the Cloud Native Computing Foundation (CNCF). This blog series will use the OpenTelemetry specification and SDKs, but collect and export a variety of the formats it handles. The Application Example The example for this post is an ExpressJS application that serves API endpoints and exports Prometheus-compatible metrics. The tutorial starts by adding basic instrumentation and sending metrics to a Prometheus backend, then adds more, and adds the Chronosphere collector. You can find the full and final code on GitHub. Install and Setup ExpressJS ExpressJS provides a lot of boilerplate for creating a JavaScript application that serves HTTP endpoints, so it is a great starting point. Add it to a new project by following the install steps. Capture media streams Not only does the JMF allows you to play music, but you can use it to capture media content as well. And all this will happen while you process and capture it from a source to a destination. You'll then identify each media stream by its content format. From there, the JMF will present the content of that specific video stream. Each media stream will have at least one or more tracks that you can play. Identify each media stream by location You can either identify your media stream by using uniform resource locators (URLs) or media locators. It doesn't matter how you locate them. What matters most is that you wouldn't struggle to identify each media stream. Process Time Bases and Clocks You can also play time-based media, or capture them at an accurate time. To achieve this, JMF requires time-bases and clocks. So, without a thorough understanding of time bases and clocks, you won't be able to work with JMF. While at it, use the below 1. Eliminate Unused Tables Usually, when you remove or deactivate a plugin, all the database tables remain. This can be a good thing, as you retain all the user information, preferences, and other data. However, in most cases, you’re left with a cumbersome dataset that may bring your server’s performance down. If you’re using WordPress, you can get rid of leftover tables by installing a plugin called Plugins Garbage Collector. It scans your database for any unused tables, and you can delete the ones that you know aren’t needed. A more hands-on approach is finding inactive tables using the UPDATE_TIME string. 2. Create an Execution Plan The execution plan’s main goal is to display the various methods of retrieving data by containing the operation's type and order when creating a query. If you’re not familiar with execution plans, here’s a video going through the basics. The typical execution plan includes the following: Types of operations Order of operations Indexes to use Row count estimates from stats Row count actual from results 3. Use Proper Indexing Indexing allows for faster access to the database and speeds up the queries. If you don’t use indexes at all, then processing the queries becomes painfully slow. Yet, over-indexing your database is also ineffective. Unfortunately, there isn’t a golden rule for optimizing your database the right way. However, with some trial and error, your database benefits from an index system. 4. Avoid Coding Loops A SQL query that runs more than once is inefficient and can cause unnecessary performance issues, which pile up quickly, especially with large datasets. In essence, moving a query outside a loop with the goal of it executing only once is the way to go. There are a couple of nifty solutions to achieve this. Use JOIN and GROUP BY to select data from multiple tables and have the database perform the counting with a single query. This is especially effective for multiple queries, including COUNT and MAX clauses. 5. Get Rid of Correlated Subqueries Correlated subqueries are essentially coding loops. The subquery runs row-by-row until it satisfies the parent statement. This method of processing is useful when the outcome relies on multi-part answer validation. You can avoid the correlated subqueries by using JOIN clauses, which makes the query run more efficiently. Essentially, this method replaces WHERE and removes the necessity to execute the subquery for each row separa 6. Avoid * Queries The ultimate goal of every query is to retrieve relevant data for maximum efficiency. However, it’s relatively common to use SELECT * clauses when creating a query resulting in unnecessary data. While it doesn’t play a massive role in the performance of small datasets, it can leave a significant dent in larger ones. Selecting the data sparingly helps with optimizing the query speed and reduces resource usage. A quick way to turn this issue around is using the LIMIT clause instead of SELECT *. This way, you limit the output of the query results unless you do need the entire dataset retrieved by the query.

With IntelliJ IDEA supporting a fully-functional integration with Maven, you can automate your entire building process. The result is that you can create a new Maven project as well as easily handle multi-module projects. Netbeans IDE on the other hand, simplifies the development of mobile applications as well as web and desktop applications using Java and HTML5. So imagine my surprise when some weeks ago, I saw a colleague fighting IntelliJ's Maven support. A dependency was not detected by IntelliJ's Maven support and to fix it, he had to remove the dependency from the POM, save it, add it back to the POM and save it again. Hmmm... somehow not quite optimal. This was the reason for me to take a look at IntelliJ's Maven support and compare some points with the support provided by NetBeans. Let’s look first at how IntelliJ IDEA can support an integration with Maven that is fully functional. This will assist you in automating the whole build. It doesn’t matter whether you wish to create a totally new Maven project, synchronize with an existing open project or add Maven support to existing IntelliJ IDEA projects. You can also manage projects that are multi-module. Creating New Maven Projects These are the steps I’d follow to create a new Maven Project. If you’re starting from scratch and there’s no project open currently in IntelliJ IDEA, go to the Welcome screen and click on New Project. Alternatively, you can select File and then create a new project for the main menu. Once you’ve created your new project, you must name it and if you require it, change its location. You’ll want to create the Git repository, so select the new project for placement under version control. Just be aware that you can do this at any time later in the build. Don’t forget to tick the box. Your project requires a language selection, so do that as well as add any other languages you may want via plugins. You do this by clicking “App>general add”. Under "build system", select Maven followed by specifying the project’s SDK. Or, you can go with the default or JDK. While it is not necessary, it’s a good idea to have a file with a basic sample code, so tick the “add sample code” box. Don’t neglect to specify Maven’s coordinates, which are included in the pom.xml file. You’ll find these in the advanced settings where a new project package is identified in the Groupid box and the project name is specified via the Artifactid box contents. Maven naming conventions follow Jav’s package name rules. This is in the format of a reversed domain name that you control e.g. org.apache.maven. While the naming conventions are not enforced, you’ll have a hard time getting names that don’t follow the rules in the Maven central repository, especially if it is a single word used for group IDs. When you’ve finished your selections, then click “create”. Handling Maven Projects If you open a Maven project in IntelliJ, IntelliJ still generates a default project folder (".idea") and file (".iml"). This means IntelliJ must always ensure that data in the POM is kept in sync with its proprietary structures. However, IntelliJ only handles one direction. Changes in the POM are recognized and the project settings are in sync most times. But if you change something in the project settings, these changes are not reflected in the POM. So, as my colleague experienced, you have to do it twice. Also, IntelliJ lists the "target" folder and ".idea" project settings folder in the logical project view, which is not useful most of the time. In IntelliJIDEA, the Maven project pom.xml file has a compiler included as well as the target Java version. There’s also a Maven tool window and any dependencies that are required to start work. Just bear in mind that the version of Java that is specified in the pom.xml file will, in all likelihood, override the "JDK for importer" option’s specification version. You can find this in the Maven settings. Configure Maven Settings To make things easier, configure your Maven settings before opening new projects. Configuring IntelliJ IDEA to display the Maven settings prior to opening an existing project that is being opened for the first time in IntelliJ IDEA is done at the application level. Once set, they’ll appear for any new project that you open. On the Welcome screen, “All settings” under the customize option. You can also access it from the main menu by selecting “file”, then “new project setup” followed by “preferences for new projects.” In the “preferences” dialog under settings, choose “build”, then “execution”. Under deployment, select Maven as your option under “build tools.” Now go to the Maven settings dialog and make the selection “Show settings dialog for new Maven projects”. You can then click OK and your changes will be saved for all future projects. What this does is, each time you open new projects, the Maven settings dialog is displayed by IntelliJ IDEA and you can then specify the local Maven repository’s location as well as a user settings file. In contrast, NetBeans uses the POM for pretty much everything. The Maven POM file defines the project, as shown below. If you change something in the project settings, it is directly stored in the POM. Only in rare cases, e.g., if you redefine actions, does NetBeans need to create a specific file. NetBeans only shows important information in the Projects window, as shown above. However, if you do want to see the Maven "target" folder, you can easily switch to the Files tab: Building Maven Projects When you build a Maven project in IntelliJ, with the default IDE commands, Maven is not used for the build process. The same goes for tests. If you are using different profiles for local development and your continuous integration server, you have to use Intellij's Maven integration tab to build and test your project with Maven. This is really ugly because you cannot use all the shortcuts that make life easier. NetBeans uses Maven for all that. You can simply press F11 or use the default toolbar button or menu item to build your applications with Maven. This same action works whether you are using Maven, a plain NetBeans Ant build script, or Gradle. It’s always the same consistent procedure. You can even change the Maven command that is used to build the project via F11. You are completely free to configure what you need: Executing Maven Goals Running Maven goals in IntelliJ displays a dialog with just two text fields and you have to type all the Maven parameters by hand. Hey man, it could be so much easier. Running a custom goal in NetBeans gives you a fantastic dialog with lots of possibilities. You can choose the profile, add properties, and even save everything to run it again later. This saves a lot of work. Conclusion There are many smaller issues that show that NetBeans has a smoother Maven integration than offered by IntelliJ. My impression is that IntelliJ's Maven support is just an extension to its default project management system since It still needs the default IntelliJ project folders and files. Meanwhile, NetBeans provides a much deeper and more complete integration. One more thing. I’m not an IntelliJ user so please forgive me if there is a mistake in my observations. I'm also not trying to start a new IDE war. What I want to do by means of this article is to get readers to think out of the box. If you are familiar with your IDE, that is great. If you are productive with your IDE, that is great. But if you think an IDE needs to be expensive in order to be a good product, you are totally wrong and should definitely give NetBeans a try. Thorsten Marx is a product manager and developer at e-Spirit AG in Germany.

In 2018, the Realm Report predicted that Kotlin, a cross-platform programming language, would overtake Java by the end of the year. Was the forecast accurate?

When Apple finally released Java 6 for Mac OS 10.5.2, the Java community was more than a little upset. Java 6 only supports 64 Bit on Mac No Cocoa Support What to Do About Java 6 on Mac Using Java on Mac in 2022 What’s Changed Since Java 6 Where is Java on Mac Headed? The history of Java releases on Mac has been more than a little problematic. New updates for Java always find their way to Mac a few years too late and they are often more limited than their Linux and Windows counterparts. Let’s see how Java 6 on Mac stacked up and take a look at the latest Java release for mac and see how it compares. Java 6 on Mac Only Supports 64 Bit This means that Java 6 doesn't run on 1-year-old MacBooks or all early adopters of the Intel switch. A huge amount of people can't run 64-bit. Java 6 on Mac requires much more specific technology than Java 6 did on any of its counterparts. We tend to have a lot of opinions about how to code differently with Java, but we can all agree that Java 6 didn’t really work for Mac. Another problem is that it only supports 64-bit applications, Bye-bye applets in Safari. These are huge setbacks for people who were looking forward to Java on Mac, but the problems didn’t stop here. No Cocoa Support Because of the lack of 64-bit libraries for cocoa, it is not possible to use cocoa with Java 6. Nearly every Java application on Macs uses cocoa to make it look better on Mac OS. Some even are 100% cocoa, like Cyberduck. Because of that, only a small percentage of Java applications can run on Java 6. Java 6 really needed more Mac-specific support in order to function like it did on Windows or Linux. In fact, you have a better chance of performance tuning Java on Linux than you did on a Mac. Apple Knows This Apple is well aware of these problems. The update doesn't make Java 6 the default VM. Apple's preferences dialog even warns you if you want to make it the default VM. Having Apple and Java clash like this only made things more difficult for people working with Java on a Mac. So, What To Do Now? Options were limited for working with Java 6 on Mac. What made Java 6 on Mac even worse was the lack of any good workarounds or alternatives. You either had to commit to a limited system or try something a little involved. These are your options. We only have three choices from here: Switch back to Windows / Linux for Java development Use SoyLatte and help them to create the native GUI pipeline Ask Apple to fix these issues In the long term, no. 2 would be the best. A Java implementation by a large community would have faster release times. We can't wait for Apple to fix these issues—we have to do it ourselves. Getting Java 6 to turn on Mac requires some pretty advanced Java tutorials. Now, let’s take a look at what’s changed since Java 6. Using Java on Mac in 2022 In terms of running Java on Mac, so much has changed since Java 6. In fact, it would be just a few years until the release of Java 7 things completely changed for working with Java and working on an Apple computer. We're going to take a look at some of these specific changes and just see how the landscape of using Java on a Mac has changed from Java 6 all the way to Java 17. Using Java has only gotten more developed as the years have gone by. After all, becoming a Java developer starts with getting Java running on your Mac! What’s Changed Since Java 6 on Mac If you were trying to use Java on Mac since Java 6, you were up against a lot of trouble. You'd have to either settle for a Java that didn't perform nearly as well as it did online up to your PC or go through a bunch of complicated workarounds and still be stuck without all the features. What's important to keep in mind is that Java is more important today than it's ever been. While you might hear some people saying that Java is on the way out, Java still has plenty of use and pops up everything from popular applications, to websites, and it is a highly preferred language for programmers the world over. Java Becomes Mac Native All the DIY fixes in the world couldn't get us ahead for making Java work on Mac. However, things would have quickly changed with the release of Java 7. Starting with Java 7, Java releases work with Apple technology as long as the systems are compatible. You can run compatible editions of Java with your Mac laptop or computer. It all depends on whether or not the specs of your Mac match up with the edition of Java you want to run. Here’s where to start to find some familiar limitations for using Java on a Mac. There are Still Limitations (Java, Intel, and Mac) Even though Java runs on Mac after Java 7, there are still some problems with trying to get Java to run on Apple's technology. If you’re looking for the best toolkits, tips, and tricks for Java, you’re going to need to get it running first! Despite all the advances that are made, you're still going to encounter a few problems with trying to get Java to run on a Mac. The first thing that we have to talk about is that Java is designed to work with the Intel processor versions of Mac. Now that Mac is coming out with their own processor chips, we're seeing compatibility issues with Java and plenty of other technology that people rely on. Apple's desire to keep everything proprietary and stay in a closed sandbox is definitely costing them when it comes to reliably working with some of today's most popular technology. There are also issues when it comes to which Mac operating system you're using. There's a good chance that your Java version might not be compatible with the Mac computer that you're working with depending on the operating system that that Mac runs. Where Things Are Headed for Java on Mac There is good news for the future though. As Apple’s processor technology becomes more popular, more software is going to become compatible. Java is likely to follow suit with Adobe and plenty of others working to find ways to work with Mac’s M1 processors.

Sun released update 14 of the Java 6 JDK and JRE. As well as the usual collection of bug fixes, this release includes some experimental new features designed to improve the performance of the JVM (see the release notes). One of these is Escape Analysis. What Is Escape Analysis? Escape analysis is a compiler optimization technique that analyzes an object's access path to determine whether or not it is escaped from its current scope. If an object is not escaped, then the compiler can allocate it on the stack rather than on the heap. This eliminates the need for memory allocation and garbage collection for the object, which can improve performance. Allocating on Heap Vs the Stack To understand the implications of allocating an object on the stack or heap, it is first necessary to understand how these two data structures work. The heap is a pool of memory that is managed by the JVM. When an object is created, it is allocated a space on the heap. The size of this space depends on the object's type and the fields it contains. The stack is a data structure that is used to store local variables and function call information. When a function is called, its parameters and local variables are stored on the stack. When the function returns, these variables are popped off the stack. Allocating an object on the heap requires two operations: The object is allocated a space on the heap. The object's reference (a pointer to its location on the heap) is stored on the stack. Allocating an object on the stack requires only one operation: The object is allocated a space on the stack. Because allocating an object on the heap requires an extra operation, it is generally slower than allocating on the stack. In addition, heap allocation requires the JVM to manage the memory used by the object. This includes finding a free block of memory of the appropriate size and dealing with fragmentation. Stack allocation does not require any memory management, as the stack is managed by the operating system. What Is a Compiler? A compiler is a program that converts code written in one language (usually called the source language) into another language (usually called the target language). The target language can be either machine code or another high-level programming language. In Java 6 Update 14, escape analysis was turned off by default but could be enabled by passing the -XX:+DoEscapeAnalysis flag to the java command. However, now Escape analysis is supported and enabled by default in Java SE 6u23 and later. What Is An Object? In Java, an object is a self-contained unit of functionality that can be created and used independently. A typical object consists of both data and behavior. Data is represented by fields (also called member variables or instance variables), and behavior is represented by methods. You can think of an object as a "thing" that can perform certain actions and contains certain information. For example, a car is an object that can be driven (behavior) and has a color (data). Why Is Escape Analysis Important Today? Escape analysis is important because it can improve performance by eliminating the need for memory allocation and garbage collection for certain objects. When we say "garbage collection", that refers to the process of reclaiming memory that is no longer being used by the program. In general, garbage collection can be a CPU-intensive operation, so eliminating it can improve performance. Any time you can avoid allocating memory and/or doing garbage collection, your program will run faster. What Are Some Examples of Objects That Can Benefit from Escape Analysis? Small objects that are created and used within a single method can often benefit from escape analysis. For example, consider the following code: public static void main(String[] args) { String s = "Hello, world!"; System.out.println(s); } In this code, the String object created on line 3 is not escaped. It is created within the main method and is used only within that method. As a result, the String object can be allocated on the stack rather than on the heap. This eliminates the need for memory allocation and garbage collection for that object. How Does Escape Analysis Work? To determine whether or not an object is escaped, the compiler uses a flow-sensitive, interprocedural analysis. This means that the compiler not only analyzes the code within a single method but also looks at how the object is used in other methods that are called from the current method. If an object is only used within the scope of a single method and is never passed as an argument to another method, then it is not escaped. For example, consider the following code: public class MyClass { public static void main(String[] args) { MyClass obj = new MyClass(); obj.method1(); } public void method1() { int x = 5; method2(x); } public void method2(int y) { int z = y * 2; } } In this code, the MyClass object is created in the main method and passed as an argument to the method1 method. The method1 method then creates a local variable x and passes it as an argument to the method2 method. The MyClass object is therefore escaped because it is used in another method (method2) that is called from the current method (method1). In contrast, the local variable x is not escaped, because it is only used within the scope of the method1 method. When Should I Use Escape Analysis? Escape analysis can be used to improve the performance of any Java application. It helps to reduce the memory footprint. It is most effective when objects are short-lived and are only used within a single method. To see what kind of impact escape analysis might have on my applications, I decided to try it on a couple of my more CPU-intensive Java programs. Escape analysis is turned off by default since it is still experimental. It is enabled using the following command-line option: -XX:+DoEscapeAnalysis Benchmark 1 The first program I tested is a statistical simulation. Basically, it generates millions of random numbers (using Uncommons Maths naturally) and does a few calculations. VM Switches: -server 95 seconds VM Switches: -server -XX:+DoEscapeAnalysis 73 seconds Performance improvement using Escape Analysis: 23% Benchmark 2 The second program I tested is an implementation of non-negative matrix factorisation. VM Switches: -server 22.6 seconds VM Switches: -server -XX:+DoEscapeAnalysis 20.8 seconds Performance improvement using Escape Analysis: 8% In both cases, escape analysis gave a noticeable performance improvement. I was quite surprised by how much of an improvement I saw in the first benchmark. I wasn't expecting to see anything like that. Escape analysis is an important tool in the JVM performance tuner's armory and it's good to see that it is being improved and refined in each new release of the JDK. Are There Other Ways To Reduce Memory Footprint in Java? Yes, there are other ways to reduce the memory footprint in Java. One way is to use object pooling. Object pooling is a technique for reusing objects that have already been created. Another way is to use a generational garbage collector. A generational garbage collector is designed to collect short-lived objects more efficiently than long-lived objects. Finally, you can use a compacting garbage collector. A compacting garbage collector moves objects around in memory so that there are fewer gaps between objects. This can help to reduce memory fragmentation. Conclusions These benchmarks are neither representative nor comprehensive. Nevertheless, for certain types of programs, the addition of escape analysis appears to be another significant step forward in JVM performance. In conclusion, although escape analysis is still experimental, it is definitely worth experimenting with in your own applications. If you are interested in learning more about escape analysis, I highly recommend reading about it further on Dzone.

Putting Together the Best of Both Worlds One of the things that people like so much about JavaFx is the fact that it has a suite of powerful tools used by designers and creators to get exactly the kind of look and feel that they desire from their creations. When used properly, JavaFX will change the way that you take care of your biggest technology challenges. That is why it is such a powerful product to use, and that is also why people around the world recommend it for the value that it can add to your work. A few of the features that are included are: WebView Java APIs High-Performance Media Engine Multitouch Support Canvas API These are just a few of the things that JavaFx has going for it. Truly, it is a powerful engine that people use to help make sure their media creations are something that people will stand up for and take note of. The truth is, no matter who you are or what your intentions are for the use of Java in your life, the JavaFX combined with Java itself is the way to go. while experimenting with javafx, remember that java is never far away. in this case, let's call out to : here we go, here's all that's needed, via the scripting api, which is included in the javafx sdk: package calc; import java.io.inputstreamreader; import javax.script.scriptengine; import javax.script.scriptenginemanager; import javax.script.scriptexception; public class calculatorlauncher { public static void main(string[] args) { try { scriptenginemanager manager = new scriptenginemanager(); scriptengine engine = manager.getenginebyextension("fx"); inputstreamreader reader = new inputstreamreader(calculatorlauncher.class.getresourceasstream("calculator.fx")); engine.eval(reader); } catch (scriptexception ex) { } } } and so, here's my whole application, calling jim weaver's calculator demo: What is even better would be to be able to embed that JavaFX stage (or a panel-like part thereof?) into a JFrame. then one would have the best of both worlds: the graphic "oomph" of JavaFX, together with the daily low-level grunt work of java. that, I believe (and hope), is the promise of JavaFX for java developers (and groovy developers), as opposed to designers and similar graphic artists, who seem to be the primary target of JavaFX. Day-to-Day Grind Work One thing that people absolutely love about Java itself is that it allows them to get the day-to-day grunt work done that they need to be done. They are able to see real progress on a daily basis simply by using Java to help propel their best efforts into the world. Yes, there are not as many bells and whistles with Java as there are with JavaFx and other tools, but that just means that there is more to combine with Java to get it to do all that you want it to do. Using JavaFX and Java together can help get more done. This is an innovative approach because it means that they are able to use the bells and whistles of JavaFx incorporated into the practicality of Java itself. Bringing those two things together is a great way for everyday people to achieve results in their work that they would not normally have believed was possible. We do need to recognize the fact that there are many great resources that Java can be used for, but it is also the case that JavaFx simply gives it the extra push that it needs to be a great computing program all around. We would be remiss if we didn’t combine the two things together for optimal use. Does JavaFX Makes Sense For Business Applications? There is still a lot of debate about how much sense it makes to use JavaFX for business applications. On the one hand, there are a lot of people who prefer this as their technology of choice. However, there are some others that say that it is too buggy and can’t handle all of the data that is required for a business operation to run smoothly. What people really like about JavaFx is the fact that it can be used on a “zero installation” basis. This means that it doesn’t need to dig deep into your databases and systems in order to function the way that it is supposed to. That is a pretty big deal because you may find it quite irritating to try to deal with systems that constantly request permissions from you to get deeper and deeper into sensitive data. JavaFX doesn’t do that. However, there is a trade-off. The fact that JavaFX doesn’t need to be as deep into your company’s systems also means that it doesn’t necessarily have the computing power that you may require to fun every operation that you need it to. That means that there could be unnecessary crashes and delays when you attempt to use this system as a standalone program. Does Combining It With Java Help? Some of the issues that are seen with JavaFx may be relieved by the fact that you can also use plain old Java to help make things run a little more smoothly. That’s right, you can combine the Java platform that you are already familiar with to let it latch on to the JavaFx system and generate results that way. You may see fewer system errors and hang-ups when you use this older piece of software to aid the JavaFx system. Regular Java does require more permissions to your data, but that may be a trade-off that you are willing to make if you understand that the upsides are potentially quite enormous for you. Think about your options carefully and then make a decision. Unless you are guarding particularly sensitive data at your company, it probably makes sense to go forward with the plan to get JavaFx and Java combined into the rotation of programs that you use. Innovation Is At Your Fingertips There is plenty of excitement and buzz about the possibilities that JavaFx can bring to the world of business. People are looking at it and starting to realize that there are many ways that it may be used as an innovation machine. They are particularly excited that there are more options than ever available to them and that they can see the ways in which this system may be used to generate outsized business opportunities both for the company that they work for as well as for themselves. If you haven’t had the chance to try the JavaFx system for yourself yet, you need to give it a shot. There are a lot of people who are already benefiting from what it has to offer, and you may fall behind if you don’t try it out as well. Look at what it can do when you get the chance, and then get one for yourself and begin the process of innovation. You won’t regret taking this opportunity to expand your horizons.

You've come to the right spot if you are trying to hack OpenJDK with NetBeans IDE. This article explains what OpenJDK with NetBeans is and how you can use NetBeans to create OpenJDK. But before we dive in, first things first: What are Hack OpenJDK and NetBeans IDE? Open Java Development Kit (JDK) is an open-source implementation of the Java Platform or Standard Edition. That means anyone can access the source code and GNU General Public license of the OpenJDK. You may also ask, "then what is Netbeans?" NetBeans is also an open-source integrated development environment for developing with Java, PHP, C++, and other programming languages. All THE applications are developed modules in Java. The OpenJDK repository contains a NetBeans project for all C/C++ parts of the OpenJDK, including Hotspot. So, since NetBeans is an Apache project, it is pretty easy to download and hack the code. You can run it on operating systems like Windows, Linux, and macOS. Remember, to use NetBeans for Java programming; you first need to install Java Development Kit (JDK). Can I use NetBeans with OpenJDK? Yes, you can. The latest NetBeans version of NetBeans is at NetBeans IDE 6.0 Beta 1. But keep this in mind, to hack OpenJDK, you'll need only the Java SE version. Which JDK is compatible with NetBeans? The JDK is compatible with JDK 8 features. That includes annotations, compact profiles, lambda expressions, and repeatable. When you use any of those constructs in your code, they will automatically highlight errors and allow you to fix syntax. Review, Hacking, and Develop OpenJDK. You follow these simple: Get OpenJDK, as follows: #hg clone http://hg.openjdk.java.net/jdk8/build jdk_trunk #cd jdk_trunk #sh get_source.sh #mkdir build #cd build #sh ../configure. After you’ve "configured", the step is complete, remember the value assigned to "Boot JDK" and then:#export IDE_ALT_BOOTDIR=jdk_path_found_by_configure #netbeansStart NetBeans IDE (with C++ support) and open projects from "common/nb_native". Just make sure that the project already contains configurations for Solaris, Linux, and macOS. You can do this by switching to the appropriate configuration and enjoying hacking OpenJDK. Next up, navigate inside your NetBeans project directory. Once there, you will find a directory called incubator-Netbeans. This directory contains sufficient NetBeans modules. Is OpenJDK with NetBeans IDE secure? As the emphasis increases, so does the need for security. Hence, you can easily create the Secure Directories. You can do this by choosing File > New Project (Ctrl-Shift-N), selecting Web Application from the Java Web category, and clicking Next. Regression testing verifies that system changes do not interfere with existing features or code structure. They are part of almost every test suite in software development lifecycles. It is common for developers to change or add a code section and unintentionally disrupt something that is working just fine. Visual regression testing functions on the same logic but confines it to the visual aspects of the software. It works by comparing two images and automating complicated scenarios, like when we cannot identify the elements in the DOM tree. However, visual regression can be used on any website. How Does Visual Regression Testing Work? During the first run, the visual comparison tool captures the snapshot called the base image. The subsequent run compares the base image if there is no difference test is passed, and if there is a difference, the test is considered as failed. Visual regression is also called visual comparison testing. In this tutorial, we will discuss automated visual regression using Playwright. Prerequisites for Visual Regression with Playwright Download and install NodeJS Download and install Visual Studio Code (Recommended) Install Playwright NPM module Install @playwright/test module Note Throughout this tutorial, we are using Playwright with JavaScript. Playwright comes with the default visual comparison tool, so there is no need to install additional packages. Create Simple Visual Comparison Tests Using Playwright In your tests folder, create a new JavaScript file example demo.spec.jspage.screenshot() function takes the screenshot, and expect in the @playwright/test module provides the assertion for matching the images that are .toMatchSnapshot(). Inside the newly created JavaScript file, create a new test that performs the visual comparison like below. Visual Comparison in Playwright to Ignore Minor Differences The above comparison technique matches the screenshot pixel by pixel, which means each pixel should match exactly. This behavior can be modified by passing the argument maxDiffPixels = . Example JavaScript const { test, expect } = require('@playwright/test'); test('Visual Comparison Test Demo', async ({ page }) => { await page.goto('https://playwright.dev'); expect(await page.screenshot()).toMatchSnapshot({ maxDiffPixels: 200 }); }); In the above example, we have specified the maxDiffPixels value as 200, which means the maximum pixel difference can be 200. Image Comparison in Playwright With Threshold Option Playwright toMatchSnapshot() accepts threshold, threshold ranges from 0 to 1, default value is 0.2. The threshold is tolerance of image differences. Example Code JavaScript const { test, expect } = require('@playwright/test'); test('Visual Comparison Test Demo', async ({ page }) => { await page.goto('https://playwright.dev'); expect(await page.screenshot()).toMatchSnapshot({threshold:0.5}); }); In the above code, the threshold is mentioned as 0.5. Playwright Visual Comparison Tips and Tricks In Playwright, we can pass the image file name; instead of default comparison, Playwright compares with the specified filename. Example expect(await page.screenshot()).toMatchSnapshot('home.png'); Playwright also allows us to compare element snapshots; we can take a snapshot of DOM elements and compare. Example expect(await page.locator('xpath=//*[@id="__docusaurus']).screenshot()).toMatchSnapshot(); Visual Regression With Playwright Using Percy Percy is a web-based tool for visual testing with a free tier, and it provides both manual and automation capability for visual comparison. Percy supports Playwright integration. Percy is now a part of Browserstack. If you already have a BrowserStack account, you can sign in with BrowserStack or sign up and create one. Using Percy With Playwright Step 1 – Install Percy modules using the following command. npm install --save-dev @percy/cli @percy/playwright Step 2 – Create a new JavaScript Playwright test file like below. JavaScript //demo.spec.ts const { chromium } = require('playwright'); const percySnapshot = require('@percy/playwright'); (async () => { const browser = await chromium.launch(); const page = await browser.newPage(); await page.goto('https://www.browserstack.com/', { waitUntil: 'networkidle' }); await percySnapshot(page, 'Example Site'); await browser.close(); })(); In the above example, we are navigating to https://www.browserstack.com/, and we are taking a snapshot using the percySnapshot() function. Setting Up Percy Step 1 – Login to Percy. If you don’t have an account, create one. Step 2 – Create a new project. Step 3 – Copy Percy token. Step 4 – In your Visual Studio Code Terminal, set the PERCY_TOKEN environment variable using the below commands: Powershell / Visual Studio Code Terminal $env:PERCY_TOKEN = "your_token"

Follow a brief explanation of CI/CD and how to implement caching of Maven dependencies in the pipelines while deploying your Mule application to CloudHub.

The author explains the main idea of indexes and how to create them in Java. Creating fast search using the right data structures.

This tutorial will cover a way to simplify the code with JDBC using the Spring JDBC Template.

If you're thinking of using Vaadin for your UI components, here are some resources, including two videos, to see how you can incorporate it into both Spring and Java EE.

Sealed types, switch expressions, and record types. Here are just a few new features introduced in the latest Groovy 4.0 release. In this article, I want to show you ten things that make Groovy 4.0 amazing.

Learn of challenges associated with processing physical receipts for digital expensing operations and discover an OCR API solution to alleviate the problem.

The Jersey project is very well documented so it makes it easy to learn REST with Java. In this article I’m going to build two projects. The first project will be a very simple HTML page that presents a form to the user and then submits it to a REST project residing on the same server. The second project will be the REST part. For this article I used the following tools: 1. Netbeans 7 2. Apache Tomcat 7 3. Jersey 4. Java I built this on OS X Lion. Go ahead and create a new Maven Web Application with Netbeans 7 called: MyForm Once the project has been generated take the resulting (default) index.jsp file and delete it. In its place add a file called: index.html and add the following content to it: Name: Message: Item 1: Item 2: Basically, I created a simple (ugly) form that takes a few parameters the user enters. They submit the form and the data is sent to the REST project we will soon be building. The idea here is we are using an HTTP POST to create a new message. That’s it for the first project! With Netbean’s Maven integration do a Clean and Build and then deploy the resulting WAR file to Apache Tomcat. Create another new Maven Web Application with Netbeans 7 called: RESTwithForms Add two new Java classes to the new project: 1. MyApplication 2. MessageResource The code for MyApplication.java is as follows: package com.giantflyingsaucer; import com.sun.jersey.api.core.PackagesResourceConfig; import javax.ws.rs.ApplicationPath; @ApplicationPath("/") public class MyApplication extends PackagesResourceConfig { public MyApplication() { super("com.giantflyingsaucer"); } } In a brief nutshell this code allows us to make use of some Servlet 3.0 goodies (we don’t need to create a web.xml file for this project as an example). For more details see the sections titled: Example 2.8. Reusing Jersey implementation in your custom application model and Example 2.9. Deployment of a JAX-RS application using @ApplicationPath with Servlet 3.0 at this link. The real guts of the REST project are in the MessageResource.java file as seen below: package com.giantflyingsaucer; import java.net.URI; import java.util.List; import java.util.UUID; import javax.ws.rs.FormParam; import javax.ws.rs.POST; import javax.ws.rs.Path; import javax.ws.rs.core.Response; import javax.ws.rs.Consumes; import javax.ws.rs.core.MediaType; @Path("/messages") public class MessageResource { @POST @Consumes(MediaType.APPLICATION_FORM_URLENCODED) public Response createMessage(@FormParam("name") String name, @FormParam("message") String message, @FormParam("thelist") List list) { if(name.trim().length() > 0 && message.trim().length() > 0 && !list.isEmpty()) { // Note 1: Normally you would persist the new message to a datastore // of some sort. I'm going to pretend I've done that and // use a unique id for it that obviously points to nothing in // this case. // Note 2: The way I'm returning the data should be more like the commented // out piece, I am being verbose for the sake of showing you how to // get the values and show that it was read. return Response.created(URI.create("/messages/" + String.valueOf(UUID.randomUUID()))).entity( name+ ": " + message + " --> the items: " + list.get(0) + " - " + list.get(1)).build(); // This is a more real world "return" //return Response.created(URI.create("/messages/" + String.valueOf(UUID.randomUUID()))).build(); } return Response.status(Response.Status.PRECONDITION_FAILED).build(); } } Note: Pay special attention to the comments. Please don’t email me stating I shouldn’t be returning text back with the values, also please don’t tell me I should be iterating the list, etc. this is just a demo. You will obviously do this differently in a production environment. The key here is simplicity and minimal code. At this point you need to add jersey-server as a dependency in your POM file. com.sun.jersey jersey-server-linking 1.9.1 With Netbean’s Maven integration do a Clean and Build and then deploy the resulting WAR file to Apache Tomcat. You are now ready to test it out. Load up the HTML file from the first project and enter some data and then submit it. If you have a tool like FireBug for Firefox, you can also see that an HTTP 201 was returned (if successful). If you don’t enter any data in the form then you should get an HTTP 412 back. With not much more work you could just as easily use something like jQuery and submit the form via AJAX.

After discussing the history of threading and how to initiate/begin a thread, now let's look at an illustration of how to leverage threads to our advantage.