The java code programming is used in many devices. This language is very important because is it object oriented, multi-platform and it can be also used for graphic programming. The only thing you need to start programming is to have a Java Virtual Machine installed in the computer/device where you want to make a programm.
The Java language can be written in simple file, and then compiled with the Java compiler. There are many ways to compile the code: by console or by some IDE (Integrated Development Environment, a programming tool). The most easiest way to programm in any language is to use an IDE. Those tools help us to avoid programming mistakes, import mistakes...
The Java language can interact with many external devices, but for this cases, you must import the specific libraries. Those libraries must be correctly imported, otherwise the programm will not run properly.
The worst thing of the Java language, from my side, is the difficulty for working with some utilities of the operating system, like files, serial ports, mouses, keybords... Apart from this, the Java language is one of the most used languages, it can used for a lot of utilities and have a lot of frameworks for the web programming.
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