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Java JDK 8
Java SE Development Kit 8 (JDK )

This guide will show you how to install Java JDK 8 on Windows, Mac OS X and Linux.
The choice of Java as a language for development was not occasional, but due to the fact that of the 21 million existing developers in the world, 9 million are Java developers, according to the Global Developers Population and Demographic Study in 2016. It is one of the largest development communities in the world!

Windows
macOS X
Linux (debian based)
Step 1: go to link. Accept license agreement and download latest Java 8 JDK (32 or 64 bit) for Windows:
Requires an Oracle account
Step 2: if download is complete, run .exe for install. Click Next:
Step 3: select the path of JDK installation and click Next :
Step 4: select the path of JRE installation and click Next :
Step 5: once installation is complete click Close :
Step 6: open CMD (command line prompt) as administrator;
Step 7: set JAVA_HOME environment variable:
C:\> setx JAVA_HOME "C:\Program Files\Java\jdk1.8.0_231"
Step 8: add JAVA_HOME and subfolders to PATH :
C:\> setx PATH "%JAVA_HOME%;%JAVA_HOME%\bin;%JAVA_HOME%\lib;%PATH%;"
Step 9: reopen your CMD (command line prompt) and try:
C:\> echo %JAVA_HOME%
if response is C:\Program Files\Java\jdk1.8.0_231 you installed everything correctly.
For the matter of simplicity you've chosen Java JDK 8 implementation of AdoptOpenJDK.
Install brew, it is pretty easy and straightforward. Paste the following command on your terminal.
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Brew is a package manager that easily allows you to install packages on macOS X, it is similar to the debian package manager apt-get. Paste the command bellow on you terminal and you will have the Java JDK 8 on your machine.
brew cask install adoptopenjdk/openjdk/adoptopenjdk8
Step 1: open terminal (CTRL+ALT+T);
Step 2: updates APT:
$ sudo apt update
Step 3: install Java 8:
$ sudo apt-get install openjdk-8-jdk
(Optional): if you already have another Java version:
$ sudo update-alternatives --config java
and select the correct version.
You have successfully installed Java JDK 8 on your machine.

After that it's possible to start into many IDEs! Start with Visual Studio Code or another non Maven friendly, following the Maven installation guide.
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