A18.1.1 Java
Go to Sun or Oracle website and search for downloading the Java Development kit (JDK). You will get to download a .zip file. Note that the version of the JDK are changing quite regularly, therefore the version presented in this manual may not be up-to-date when you read it, but the spirit is the same. The JDK (Java development kit) includes the JRE (Java Runtime Environment).
A18.1.2 Installing a compiler: Example with Apache maven
You can download Apache Maven at http://maven.apache.org/download.cgi and save it under your program files (if you work under Microsoft OS).
Figure 481: Set Maven in your poject. Select File -> Settings
Figure 482: Click on override for the “Maven home directory field”
Select “apache-maven-3 xx” (or above) from your file system.