6 Free Maven and Jenkins Online Courses for Java Developers

Maven and Jenkins are two of the most popular tools in the Java world. Maven helps to organize your project and provide support to build and deploy Java projects while Jenkins can provide continuous integration and delivery by completely automating build and deploy projects. As a Java developer, it's very important that you know both Maven and Jenkins because every other company is using it and not knowing these technologies will only put you behind other candidates if you go for a job. If you have yet to learn Maven and Jenkins then you have come to the right place, In this article, I will tell you 6 free course you can take to learn Maven and Jenkins online, but before that, let's understand what is Maven and Jenkins and what are their purpose.

Eclipse - Unsupported major.minor version 53.0, 52.00, 51.0 Error in Java

The UnsupportedClassVersionError is a big nightmare for Java developers, probably the next biggest after NoClassDefFoundError and ClassNotFoundException but its slightly easier to solve. The root cause of this error is that your code is compiled using higher JDK version and you are trying to run it on the lower version. For example, the Unsupported major.minor version 53.0 means your code is compiled in JDK 9 (the class version 52 corresponds to JDK 9) and you are trying to run it on any JRE lower than Java 9, probably JDK 8, 7, or 6.

Top 5 Free React JS Courses for Web Developers to Learn Online

React JS or React is one of the most popular frameworks or Javascript library for building user interfaces. It's backed by Facebook and it's often viewed as an alternative to the great Angular framework by Google. React is also very flexible, fast, easy to learn and fun to work with. It is designed to make the process of building modular, reusable user interface components simple and intuitive and that's why most of the modern GUI and web applications are build using React framework. It is developed at Facebook and it focuses on the 'View' aspect of MVC in web applications. The component-based development is one of the biggest advantages of React library which is both rich and extensible.