Using Maven

You also have the option to use Maven, and you can view the appropriate configuration in The Central Repository by selecting the Apache Maven configuration information, as shown in the following screenshot:

You can then copy and paste the <dependency> block containing the RxJava configuration and paste it inside a  <dependencies>block in your pom.xml file. Rebuild your project, and you should now have RxJava set up as a dependency. The x.y.z version number corresponds to the desired RxJava version that you want to use:

<project>
  <modelVersion>4.0.0</modelVersion>
    <groupId>org.nield</groupId>
    <artifactId>mavenrxtest</artifactId>
    <version>1.0</version>
  <dependencies>
    <dependency>
     <groupId>io.reactivex.rxjava2</groupId>
     <artifactId>rxjava</artifactId>
     <version>x.y.z</version>
    </dependency>
  </dependencies>
</project>