How to choose a programming language for a Project: Main Tips

How often do you come across a situation where the clients don’t have a clear understanding of what exactly they want? The situation where they describe only the main concept of the future product and its basic functionality? 

Well, let’s be honest, this is a common scenario. While some clients prefer to conduct their own independent research on which language and framework are better for the product, most of them leave it to the software company to choose.

Still, the language for a new project should be chosen only after a series of negotiations with the client. There are a lot of factors that will affect your final choice — the platform, budget, deadlines, etc. To make the right decision when building a development strategy, you must also consider the expert opinion of the developers, technicians, engineers — all those involved in the process.

This is not as simple as it seems. There is a large number of different languages ​​created for various tasks, and it is hardly possible to choose the only right option. How not to make a mistake and pick the tool that fits both the development company and the client?

Choosing the right Platform

The choice of a platform depends on the customer needs — the client may need a cross-platform application or a native mobile version, a website or a desktop app. In some cases the choice is obvious. For example, a taxi service provider may not need its own website and, especially, a desktop application. Instead, an easy-to-use mobile app may be the best option for them. However, less specific products usually require both a mobile and a web application. And this is where the client should make a decision based on the budget.

For mobile development

For mobile development, it is recommended to consider Java for Android apps, and Objective-C or Swift — for iOS apps. However, a rare mobile app is designed exclusively for a single segment of the mobile market. 

Most businesses aim to cover both operating systems when developing the app. If the company has a limited budget, but still wants their product to be available to both Android and iOS users, Facebook’s React Native might be a good choice. React Native will allow you to create a product for both operating systems, significantly reducing the costs and engineering efforts.

For website development

As for website development, the list of languages isn’t just huge, it is almost endless. You should, therefore, focus on the specifics of the project and the market that it will cover. You should clearly understand the vastness of the product’s functionality, capabilities, and complexity. 

Obviously, you will need WordPress to develop a regular content-based site. But today, it is no longer a popular request. Magento and PHP-based OpenCart are suitable for e-commerce products. If you need to develop a large, responsive, agile website that will include a lot of features and data to store, then it is better to pick popular solutions like JavaScript. The tech stack is very extensive here, so you will definitely find the perfect solution.

Development deadlines 

This point is very important, and for a reason. Both the client and the development company must understand when the product will be ready for release, and when the product’s maintenance stage will start off. The faster you start the project, the more time you will have for further improvements. 

The choice of a programming language here is absolutely not obvious since everything depends on the essence of the project. However, you can use pre-built applications to reduce development time. You can conduct a code review and make the necessary changes.

Community support

You might think that this is a less significant aspect when choosing a programming language for the project. But this is not true. In fact, a large community can provide you with support at all stages of the project development. They can introduce you to a huge number of solutions and problems that you will definitely encounter in the future. So you won’t need to spend a lot of time searching for a single resolution to your problem.

Speaking of a vast community, Java, JavaScript, and C# immediately come to mind. These languages ​​are the most popular and demanded today, they have a huge number of fans on GitHub and Stack Overflow.

Conclusion

To summarize, we can say that the choice of a programming language for your next project is always an extremely individual case. So, the main selection criteria are the specifics of a particular product and available resources. Nevertheless, you can always distinguish the leaders that, in most cases, meet all of today’s necessary standards — Java, JavaScript, Python, C++

Mind, however, that the choice isn’t always about the features, it is also about the social aspect. In addition to the tech ecosystem of the language, elements like community vastness and the developers’ accessibility are worth your notice. 

Java Developer Roles and Responsibilities

Thinking about creating your project with Java? Find out what are Java developer job duties, roles, and responsibilities according to the job description first. This article is going to help.

Considering the Options to Hire This Specialist in 2021

Java development is a good choice when it comes to web project creation. This programming language is quite user-friendly while there are a lot of professionals on the market who may create a stable and secure web app for your business. However, let’s find out what are Java developer job duties and how to hire these specialists in the most beneficial way.

Who Is a Java Developer?

A Java developer is a specialist whose main specialization is Java web programming. To date, Java is one of the most popular programming languages and there are 7,1 million Java developers in the world. Thus, there is a perfect match between their supply and demand. What’s more, most of these specialists are working according to the web development outsourcing model we will discuss a little later.

What Are Java Developer Roles and Responsibilities?

As a rule, Java programming is the top duty among Java developer roles and responsibilities. However, depending on the specifics of the project, this specialist may be involved in dealing with further tasks.

  • Business needs analysis. At this stage of project development, a Java developer works closely with the Business Analyst since the first needs to gain business-specific insights of what needs to be created and how the customer imagines the problem-solving approach.
  • Code writing, testing, and deployment. Everything is quite clear with code writing. When it comes to its testing, an Entry-level Java developer works with the QA (Quality Assurance) and testing team, gets their feedback on the bugs that need to be fixed, and proceeds to code deployment when all the mistakes are corrected. Also, a lot of companies follow DevOps practices to shorten the distance between the development and operational teams and streamline the project launch.
  • Project management. As it was with the case of business analysis, a Java developer may take some part in the project management process to keep up to date with the changing requirements of the customer, deadlines, and feedback.
  • System maintenance and optimization. Also, the Java developer may be involved in the app’s maintenance and optimization after the solution is launched and there is the first feedback from real users.

Why Does Your Business Need Java Developers?

There are a lot of Java developers advantages you may consider for your project development. As you have already understood, there are a lot of Java developer roles and responsibilities he/she may perform at each stage of your app creation. Secondly, you may hire this specialist very profitably, for example, by contacting SPD-Group development company which has a tech-savvy Java developers team under their roof.

Also, there are a lot of Java developers in the world you may choose from. The choice is this specialist is more than wide so you shouldn’t be limited by your location only. All the other benefits are centered around Java technology as such.

  • Java is the second popular programming language in the world and this is quite a strong reason to consider the tool for your project development.
  • Java allows for customer-centric application creation that will be easy to maintain and improve.
  • Java makes the development of stable and secure applications possible as well.

Outsourcing vs in-House: What Is the Best for Software Development?

So, if there is the need to hire Java developers for your project creation, you have two options to choose from – you may either outsource your web development tasks to the third-party vendor or gather the development team under your roof. Both of the approaches have their pros and cons, so, let’s find them out.

Outsourcing

In this case, you should find a development company that already has a team of Java programmers or a full-fledged development team (a project manager, testers, designers, business analysts, researchers, and marketers) and entrust your whole development process to the third-party’s team.

Pros

  • You may choose from the widest talent pool possible. When outsourcing your web development, you are not limited to your physical location anymore.
  • Outsourcing is up to 60% more effective in terms of costs if to compare it with gathering an in-house team.
  • Outsourcing your web development task, you don’t need to worry about organization issues since they are solved on the side of the vendor.

Cons

  • Outsourcing means less control compared to having your development team in-house. However, this issue can easily be solved by an experienced development vendor who is able to establish effective communication.
  • There can be mentality gaps, different time zones and language barriers. However, this problem can also easily be solved by choosing the right outsourcing destination with similar mentality features and convenient business hours overlappings.

In-house development

In this case, you are responsible for gathering your development team in your office, supplying them with all the necessary equipment, paying wages and taxes, and so on. This project development approach seems to be more transparent, however, it portends a lot of work to be done.

Pros

  • You get absolute control over your team. Thus, you may be sure that your team is involved in your project development only, and you may check their progress and results every time you want to.

Cons

  • Developing your project in-house can be quite costly since you need to pay for rent, licenses, and equipment.
  • Hiring and gathering your development team can be time-consuming. What’s more, without recruitment skills, finding the right person may be challenging, and there is a great risk of making a mistake with a team member who will need to be replaced very soon.

Thus, outsourcing your project development seems to be a better strategy since it saves your time, money, and effort. What’s more, this practice is widely adopted and there are a lot of reliable development vendors to choose from.

According to An Exploratory Study on Strategic Software Development Outsourcing(PDF), “Business organizations are realizing that Software Development Outsourcing (SDO) is now an imperative and strategic step for their system operation success and that SDO really means best practice.”

Thus, the only thing remaining is to get in touch with an experienced and tech-savvy development company to make your project creation really effective and get all the benefits of the outsourcing model.

How Much Does It Cost to Hire Java Developers?

There are two essential factors that influence the cost of hiring Java developers:

  • Their location. The difference in cost can be tenfold – for example, if you compare Java developers from the top American companies and Indian programmers who will work with you remotely.
  • The amount of work you want to assign to them and describe in your Java developer job description. The more time it takes Java developers to create the functionality necessary for the full operation of your application, the higher the price will be in the end.

What Are the Best Regions Where You Can Hire Java Developers?

There are four main regions you may consider for getting in touch with highly-skilled Java developers.

Popular Outsourcing Destinations
  • Ukraine. Ukraine is the main outsourcing destination in Eastern Europe since there is no better price-quality ratio in this region. Also, Ukrainian programmers have a high technical education which allows them to stay competitive year after year. As for the prices, the cost per hour of development is $20-50.
  • Poland. Poland is a slightly more expensive destination in comparison with Ukraine, but the difference is compensated by a more European mentality. As for the level of training of specialists, Ukraine wins anyway.
  • Argentina. As for this destination, it is especially attractive for American startups because here you may hire quite an affordable workforce, plus there is a convenient business hour overlapping. Also, there is no language barrier but can be some striking differences in mentality.
  • India. As for India, this is the best destination in terms of cost. Also, there are a lot of developers to choose from. So, this country is good to outsource to if you want to start your project development almost instantly and save a lot. However, you still need to be careful with Indian development vendors’ choices; (Boeing may share some experience).

Read more about Offshore Software Development here.

Conclusion

So, using Java for your project development is quite a wise solution. Surely, you should analyze the specifics of your future solution before deciding on the technology choice. However, if you decide to proceed with Java, there will be no issues with Java developers hiring. What’s more, the cost to involve these specialists in your project is also quite responsible and affordable, especially if you choose the right outsourcing destination.

Web Scraping with Java Online Courses in 2021

Web scraping is an incredibly useful tool for people looking to build their website or data collectors mining metadata from other websites. It’s an essential skill for online marketers and is often highly valued by employers.

If you’ve been interested in becoming a website scraper but don’t know where to start, then you’re in the right place. In this article, you will find the best resources available to start web scraping in Javascript, using the various tools the programming language provides its users. Your journey to learning web scraping in Java begins here.

What is Web Scraping?

Web scraping is a coding method for extracting useful data from websites. You can scrape the metadata from images, text, headings, and almost every other aspect of a website to obtain information that isn’t readily available. 

Price changes, location data, and general website changes are all accessible pieces of information through web scraping.

While web scraping is reasonably simple, you have to have some programming knowledge to do it effectively. Knowing how to interact with websites using Javascript is half the battle. Once you have a good understanding of Javascript, web scraping becomes a relatively easy task. 

You can probably learn the basics in an hour or less if you have a bit of technical knowledge to start with.

Web Scraping: Best Language to Use

Most online courses on web scraping teach how to do it through Python, a popular programming language. Python is a multifunctional and relatively simple programming language that many programmers use daily. However, it might not be the best programming language to use for web scraping.

Javascript has multiple tools you can use for web scraping, and it’s more adaptable than Python to the various programming languages used to build websites. As such, Java may be the best programming language to use for web scraping. However, it all depends on your preference.

Best Online Courses for Web Scraping with Java

These are the best academic courses to become a web scraper available online today. 

Packt – Learning Web Scraping with Javascript

“Learning Web Scraping with Javascript” is an hour-long online video course from the online learning platform Packt. Packt’s course teaches users how to perform web scraping through Javascript and Node.js.

In the early parts of the video, you’ll learn the basics of web scraping, including why people do it, how you can do it, and how to examine the information you get from scraping static web pages. Later on, you get hands-on experience constructing usable scripts in Java and Node.js, using popular websites like Airbnb, Craigslist, and more as example templates. 

Mustapha Mekhatria, a tech consultant and professional Javascript programmer, teaches this course. Mustapha has loads of experience in different areas of website development. If you have a subscription to Packt, you can access the course for free. Non-subscribers can purchase the course for $129.99.

Udemy – Professional Web Scraping with Java

Udemy is a top-rated and useful online learning center that has courses on every subject imaginable. Udemy’s course on web scraping, “Professional Web Scraping with Java,” is taught by successful entrepreneur and software developer Patrick Meier. 

The course runs just over one hour long, making it accessible for professionals. The task-oriented class asks users to complete each chapter using their browser’s developer tools to perform web scraping test runs on different websites.

You can pause and return to the course whenever you want once you purchase it, so you can always go back and refresh your memory whenever you’d like.

The “Professional Web Scraping with Java” course costs $74.99. Udemy frequently runs price specials, so be on the lookout for price drops that make this course available for much less.

Best Books for Web Scraping with Java

Here are the best books to learn how to perform a Java web scrape like a professional. 

Hartley Brody – The Ultimate Guide to Web Scraping

“The Ultimate Guide to Web Scraping” is one of those e-books that only comes around every so often. There’s so much to learn from Hartley Brody, a programming professional highly proficient in several coding scripts. 

In this book, the author provides a comprehensive rundown of the best web scraping methods using different programming languages, including Java and Node.js. The guide explains how to perform web scraping ethically. 

Hartley argues why web scraping is a legitimate method for data collection—and shouldn’t be looked down upon by the ethical hacking community.

When you purchase the book, the author gives you access to the content on laptops, Kindles, and iPads, making sure you can read it no matter where you are or what device you use. 

Ryan Mitchell – Instant Web Scraping with Java

At only 72 pages long, “Instant Web Scraping with Java,” by Ryan Mitchell, is a short and comprehensive read on performing web scraping through Javascript, Node.js, and Cheerio. 

With this book, you’ll learn how to set up various bots to scrape websites for metadata automatically and upload it to your preferred data collection resource. Not only that, but it offers a general overview on how to write code in Java, how to check for errors in your code, and how to get around website security so you can execute your scrape quickly and effectively. 

This web scraping resource is one of the cheaper options out there. Along with many other courses and books on Packt, it’s available free with a subscription or for a low fee if you don’t have one.

Conclusion

Using the resources listed in this article, you should be well on your way to becoming a professional website scraper. Every course here provides a similar general overview of web scraping with Java, but you may find that one course does it better than another. 

While they usually cost money, there are often ways to get them free or with a hefty discount. Give the free ones a try to see if you’d like to expand your web scraping education with some of the paid options. 


About Author: Christoph is a code-loving father of two beautiful children. He is a full-stack developer and a committed team member at Zenscrape.com – a subsidiary of SaaS industries. When he isn’t building software, Christoph can be found spending time with his family or training for his next marathon. (See image att.)

Zenscrape’s Social Media Handles

Github: https://github.com/saasindustries

How to Find Best Java IDEs in 2021

At present, Java is more popular than other programming languages. The software developers use Java for developing secure enterprise applications, desktop applications, web applications, and mobile apps.

At present, Java is more popular than other programming languages. The software developers use Java for developing secure enterprise applications,  desktop applications, web applications, and mobile apps.  In addition to being a mature programming language, Java has been evolving consistently to enable developers to write better applications for small and large devices. But the developers still need robust tools to accelerate development and testing of Java applications.

The tools provided by integrated development environments (IDEs) make it easier for developers to build and test varied Java applications.

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The software developers have option to choose from a number of widely used JavaScript IDEs. But the features and tools provided by individual Java IDEs differ. Most Java IDEs come with a source code editor, a debugger, and a compiler/interpreter. The developers can avail various tools provided by the IDE through a single graphical user interface (GUI). The best IDEs for Java provide a number of robust tools to enable programmer to complete the required software development tools efficiently. The programmers even have option to choose from a number of robust IDEs for Java programming language.

TOP Java IDEs 2021: Overview of 7 Most Popular Java IDEs

1) IntelliJ IDEA

The commercial IDE provides tools for bug-free technologies including Java. IntelliJ IDEA helps developers to gain deeper insight into the code by providing features like smart completion, chain completion, static member completion, data flow analysis, cross-language refactoring, and language injection. At the same time, it enables programmers to perform common coding-related tasks in an environment without leaving the code. The developers can further accelerate Java application development using the version control tools, build tools, decompiler, test runner, database tools, and terminal provided by IntelliJ IDEA. The IDE further supports several JVM programming languages and allows developers to work with popular Java frameworks.

2) NetBeans

The open source IDE makes it easier for Java programmers to build desktop, web, and mobile applications efficiently by providing a set of robust tools and features. NetBeans is the official IDE for Java 8. Each new version of NetBeans further comes with an improved and reworked Java editor. The Java editor makes it easier for programmers to build custom software applications by highlighting Java code both syntactically and semantically. The tools provided by NetBeans even help developers to refactor the code and write bug-free code. Also, the developers can avail the GUI Builder provided by NetBeans to design GUIs for Java SE without putting extra time and effort. Here is a comparison between NetBeans vs IntelliJ.

3) Eclipse

The developers have the option to choose from both desktop and cloud editions of the popular Java IDE. Hence, the developers can opt for the cloud edition of Eclipse – Che – to keep developing Java applications through a web browser.  They even have the option to extend both bug-free of Eclipse by installing specific plug-ins. The developers can choose from a wide range of plug-ins from Eclipse Marketplace Client. At the same time, they can use the Development Environment (PDE) provided by Eclipse to create custom plug-ins according to their precise needs. At the same time, Eclipse helps developers to accelerate Java application development by providing robust tools for , charting, testing, and reporting. The IDE further facilitates incremental compilation of Java code by providing a custom compiler. Interested readers can read on the comparison between NetBeans and Eclipse.

4) Codenvy

The Java coders have the option to choose from three distinct editions of Codenvy – developer, team, and enterprise. Codenvy is designed as a cloud-based and on-demand developer workspace. The custom runtime environment provided by the IDE it easier for programmers to debug and test Java code. The developers can even use the browser-based editor provided by Codenvy to write code by availing features like code completion, refactoring and syntax highlighting. The editor even makes it easier for programmers to build, edit, debug, and run various projects. At the same time, the developers can also use Codenvy to adopt agile methodology and collaborate with stakeholders in the project.

5) BlueJ

Despite being developed as a simple IDE for beginners, BlueJ is currently used widely by Java programmers across the world. The cross-platform IDE for Java enables programmers to interact seamlessly with objects. The developers can inspect object values, call methods on objects, and pass objects as parameters. At the same time, BlueJ accelerates Java application development by providing an array of robust features. It comes with an editor that allows developers to scan the code visually, create dynamic objects, and inspect objects. Also, the programmers can invoke Java code simply by typing it in without compilation.

6) DrJava

The simple and lightweight Java development environment is primary written for students. But many Java programmers prefer DrJava to other Java IDEs due to its intuitive user interface. DrJava further enables programmers to evaluate Java code in an interactive way. Also, it provides a number of advanced features to meet the needs of skilled Java programmers. Like other IDEs, DrJava also helps programmers to write high quality code by providing features like go to line, go to file, and find/replace. It even enables programmers to avail advanced features like syntax colouring, brace matching, automatic indentation, autocompletion, and commenting/uncommenting. The developers even have option to integrate DrJava with Eclipse through a robust plug-in provided by the developers.

7) JGrasp

The lightweight Java IDE is implemented in Java. The developers can run jGrasp on any platform with Java Virtual Machine (JVM) 1.5 or higher. Despite being implemented in Java, jGrasp produces control structure diagrams (CSDs) for a number of programming languages – C, C++, Python, Objective-C, and Ada. At the same time, jGrasp comes with features to make software applications comprehensive by generating software visualization automatically. In addition to providing an integrated debugger and workbench for Java, the IDE further helps developers to generate control structure diagrams, complexity profile graphs, and UML class diagrams.

Bottom Line

On the whole, the Java developers have the option to choose from a wide range of IDEs for Java programming language. Some of these IDEs are available as commercial and licensed software, whereas others are open source and free. Likewise, some of these IDEs are robust and feature-rich, whereas others a simple and lightweight. Also, each Java IDE has its own pros and cons. Hence, it becomes essential for developers to keep in mind precise project needs while comparing the best Java IDEs of 2021.

Why Java Programming is so Popular in 2021?

Any programmer will confirm to you that Java is by far the best programming language to have ever been created. Who can argue against that fact when almost all Fortune 500 companies give it thumbs up?

Java programming is both user-friendly and flexible, making it the obvious go-to programming language for web app developers and program management experts. By flexibility, in this case, we mean that an application developed in its coding system can run consistently on any operating system, regardless of the OS in which it was initially developed. Whether you need a language to help you with numerical computing, mobile computing, or desktop computing, Java has got you covered.

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There are many programming languages out there, but Java beats them all in terms of popularity. There definitely must be a reason why it has gained so much popularity in the recent past, without mentioning how well it has shaken off competition for almost two and a half decades now. So, the million-dollar question remains: 

Why Java is the Most Popular Programming Language?

 1.      Its codes are easy to understand and troubleshoot

Part of why Java has grown tremendously over the years is because of being object-oriented. Simply put, an object-oriented coding language makes software design simpler by breaking the execution process down to small, easy-to-process chunks. Complex coding problems that are associated with C and C++, among other languages, are hard to encounter when programming in Java. On top of that, object-oriented languages such as Java provide programmers with greater modularity and an easy to understand pragmatic approach.

2.      JRE makes Java independent

JRE (Java Runtime Environment) is the reason why Java can run consistently across platforms. All a programmer needs to do is install JRE to a computer and all of his Java programs will be good to go, where they were developed at notwithstanding.

On top of running smoothly on computers- Macs, Linux, or even Windows, JRE is also compatible with mobile phones. That is the independence and flexibility that a programmer needs from a coding language in order to grow his/her career, especially if he/she is a newbie.

3.      It is easy to reuse common codes in Java

Everyone hates duplication and overlapping of roles, and so does Java. That is why this coding language developed a feature known as Java objects that allows a programmer to reuse common codes whenever applicable instead of rewriting the same code over and over again. The common attributes between two objects within a class are shared so that the developer can focus entirely on developing the different, uncommon attributes. This form of code inheritance makes coding simple, fast, and inexpensive.

4.      Java API makes Java versatile

Java API provides programmers with thousands of classes and about 50 keywords to work with. It also allows programmers to use coding methods that run to tens of thousands. That makes Java versatile and accommodative to as many coding ideas a programmer could have. That is not all; Java API isn’t too complex for a newbie to master and all one needs to get started is to learn a portion of it. Once you are able to comfortably work with the utility functions of Java, you can learn everything else on the job.

5.      Java allows you to run a program across servers

When coding for a huge organization that uses a network of computers, the greatest challenge is to sync all computers so that a program runs seamlessly on each of them. With Java’s PATH and CLASSPATH, however, you don’t have to worry about the distribution of a program across multiple servers.

6.      Java programming is adaptable, strong, and stable

Because you can run Java both on computers and mobile devices, it’s true to say that the language’s dialect is universally adaptable. On the other hand, you can run Java both on a large and small scale, meaning that its codes are strong and stable. And as we mentioned, there aren’t any limitations with Java; you can even develop translation software using this language. For the best results, however, it is always wise to work closely with a professional translation service provider.

7.      Powerful source code editor

Java’s source code editor is the Integrated Development Environment, which does not only enable programmers to write code faster and easier, but that also comes with an automated, in-built debugger feature.

In conclusion

If you ever need help with Java programming, there are companies that offer java outsourcing services to all types of organizations. Such companies make program and application development affordable. 

780+ Free Lessons to Learn Java Programming Online

Java Language For Absolute Beginner

Java is one of the languages that developers choose to learn as the first one. If you are on a basic level check the following sources that will be a great help for you!

In these resources you will find tutorials for:

  • Language overview
  • Java getting started guides
  • Java Basic programmer tutorial
  • Objects and variables in Java
  • Oops concepts
  • Array
  • Pattern
  • Cloning
  • String handling
  • StringBuffer
  • StringBuilder
  • Exception handling
  • Multithreading
  • File Input/Output
  • Framework in Java

1. Coursera (183 lessons)
Coursera is probably one of the most well-known places to look for online courses, and Java programming is not an exception. Videos are available in English, Spanish, Russian, Chinese and French languages; to make it easier, you can also use subtitles. Find Java fundamentals, Java for Android, and Java for advanced levels there!

2. Udemy (164 lessons)
Udemy is one of the biggest platforms for online courses. There are 58 free Java programming courses; and if you agree to pay up to $11, the number of classes increases drastically – 736. The user-friendly interface of the website allows sorting courses by level, languages (English, German, Spanish, Turkish, etc.) and availability of tests to check your knowledge.

3. Java 101 (42 lessons)
This free online Java course gives you access to Java world without installing any stuff, just give it a try. Use short and effective exercises to learn Java from scratch with this tutorial. One more advantage of the course – lots of examples.

4. Codecademy (7 lessons)
Codecademy offers a free java programming course for beginners where they can master the basics of this language, and work on seven different projects, including creating their own calculator. Conditionals and control flow, object-oriented programming, and data structures are in the syllabus.

5. Home & Learn (81 lessons)
Free Java Course presented by Home & Learn is designed for beginners with no previous programming experience. All you need to start coding in Java is a Java Virtual Machine and a Software Development Kit. You’ll find all the necessary links within the course description.

6. Oracle Java Tutorials (17 Trails and Lessons)
Oracle, an international software development giant, has developed its own free online Java course for beginners. Being regularly updated, this guide shows how to create applications in easy and simple way. Besides the basics, you’ll also figure out what is GUI and how to create it, learn more about custom networking and JavaBeans.

7. Sololearn (65 Lessons)
Sololearn created a free course to learn Java online. Their program consists of 6 modules with 65 lessons in total. You are going to cover such topics as loops and conditionals, arrays, classes and objects, exceptions, lists, threads and files.

8. Skillshare (192 Classes)
Learn Java programming for free and get a new skill with Skillshare classes for aspiring coders. If you’re limited in time, you can sort the lessons by length and choose the shortest ones. This website also shows the number of students enrolled for this or that corse as well as their reviews, so it’s easier to understand which tutorials are worth to watch.

9. Codementor (18 Courses and Tutorials)
The collection by Codementor consists both tutorials, courses and valuable tips and tricks for Java developers to learn this programming language online. Here you’ll find the latest Java-related news, articles about coding, and programming tasks. Need some developer tools too? You’re on the right way!

10. edX (11 courses)
Learn Java for free with edX, where the courses are presented by such famous institutes as MIT, Hong Kong University of Science and Technology, and UC3M. The majority of courses are self-paced so you don’t need to wait to enroll. Also, you can get a certificate in the end, however, this option is paid.

11. Cave of Programming
John Purcell, a software developer with 14+ years of experience, created a special course to learn Java online for free. If you’re a complete beginner, this the right place to start. What’s more, you can choose your schedule for classes as a course is self-paced.

12. Java Code Geeks
Probably one of the best features of JavaCodeGeeks is that they provide free examples of code besides traditional tutorials and guides. Also, you can find there useful ebooks to “become Java rockstar”, including JPA Mini Book, JVM Troubleshooting Guide, JUnit Tutorial for Unit Testing and many others.

13. Programming by Doing
The theory is great, but practice is better. Graham Mitchell supports this idea and offers you to take 200 practical steps to mastering Java. To make it more engaging, you’ll get tasks of different levels and get points for completing them.

14. Java Lessons
“Tutorials based on examples”, says the motto of this website. Indeed, if you want to learn Java online without exterior help, you should look through this course. Studying here starts from fundamentals, which is convenient for complete newbies, and get to the most complicated levels.

15. Fun Programming
Studying is not necessarily boring, and the guys who run Fun Programming know it for sure. They created a series of episodes explaining how to write a Java program with the elements you can see and hear. Learn Java for free and with fun!

16. Dunebook
Feel like reading? Then check Dunebook, an ultimate source of information for software engineers. Here you will find analysis of programming languages, their detailed comparison, programming tools and news. Moreover, the website is dedicated not only to Java, but also to JavaScript, Python, Laravel, etc.

Online Java Communities

If you are looking for help and advise when learning Java, if you are stuck and need some guidance you can join development communities and web forums. Meet fellow Java user and take part in discussions: Oracle CommunityGithubStackoverflow.comJava World,Java Ranch

Want to learn more?

Is Java easy to learn?

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How to make a Java Web Crawler?

This post is for those who want to step-by-step learn how to create their own Crawler in Java. A web-crawler is considered by many to be a complex application requiring deep knowledge. The guide will guide you through several simple steps to quickly master the creation of Web Crawler. You can change the creation of the scanner using Java using this textbook for your needs after spending a little time.

Given:

– You need to know the basics of Java, a bit about the SQL database and MySQL.
– Computer or remote server.

Unknown:

Web Crawler for collecting information on a given logic.

Choose goals:

For example, let’s collect all the information on the site of your university “BigBrain.edu” on the topic “apples”.

Progress:
1. The algorithm of the searcher’s work consists in the following steps:
– Open the root web page (“BigBrain.edu”) and collect there all the external links from this page. To do this we will use JSoup, which is a convenient and simple Java library for analyzing HTML.
– Then we analyze the received URL-addresses and collect new links.
– When performing the second and subsequent steps, we check which page was processed earlier so that each URL is processed only once. It is for this control that we need a database.

2. Configuring the MySQL database
Owners of Ubuntu and a guide for Windows users.

2.1. Create a database and table
Create a database named “Crawler” and create a table called “Record”, as shown below:

3. Run the crawling using Java

1) Download the main JSoup library from http://jsoup.org/download.
Download the file mysql-connector-java-xxxbin.jar from http://dev.mysql.com/downloads/connector/j/

2) Now create the project in its eclipse with the name “JavaCrawler” and add the jar jsoup and mysql-jar files that you uploaded to the Java Build Path.

3) Create a class called “JCDB”, which is used to handle database actions.

4) Create a class with name “Main” which will be our crawler.

Recommend to use Selenium to crawl a web below code by open Firefox:

How develop custom web crawler on Python for OLX? You can do it by guide from Adnan.