Java – Introduction

Hello, world! That is how I would like to welcome you to Java Introduction but also it is something a program might return for the first time when you run something you’ve created. What does it mean? That you successfully run your first program in any programming language you would like. The idea of this is to put together a few lines of code and to have an output after compiling it.

So I see you want to learn Java and that’s awesome! There are thousands of websites and videos that can help you achieve this desirable skill, and this is one of those. Why use ours? Because we would like to provide the best experience in learning offering tutorials in a friendly and really easy to understand way.

Why would you like to learn Java? Maybe is it just curiosity or maybe you are looking for a new job? Any answer you would have we would like to say that you’ve done an excellent choice coming to our website. Becoming a Java Software Developer is something that will surely help you progress in your career. Many programmers nowadays are using Java and is a language that is used on so many different platforms.

Photo by Caspar Camille Rubin on Unsplash


ESA is building its own rocket

Most of the people witnessed how SpaceX using their Falcon 9 rocket, on 30th of May 2020, sent a crew of two to ISS(International Space Station). This is an outstanding job for a private company that used its own rocket to send a capsule to orbit. As this has been a huge success and got the USA back to be able to do this kind of missions the European Space Agency(ESA) announced that is developing its own rocket engine.

Photo by SpaceX on Unsplash

The Prometheus is a rocket engine that is developed by the ESA since 2017 and aims to be a reusable methane-fueled rocket engine with the technology used previously in the Ariane 6. The idea behind this project is to build a reusable engine that costs no more than 1 million euros.

This rocket engine will run on liquid oxygen – methane with high efficiency allowing standardization and operational simplicity, according to the ESA blog. One important fact is that methane propellant is widely available and easy to manipulate.

“Features such as variable thrust, multiple ignitions, suitability for main and upper stage application, and minimised ground operations before and after flight also make Prometheus a highly flexible engine.” the ESA declared.

Some of the components have been already manufactured: the turbo pump’s turbine, the pump inlet, the gas generator valves, and some main subsystems. Following this, the ESA will soon begin the testing of these hardware components at the DLR German Aerospace Center in Lampoldshausen, Germany.