If you want to access CLIJ from your Java code, it is recommended to depend on CLIJ via Maven dependencies. Add this dependency to the pom.xml file of your project:
<dependency>
<groupId>net.haesleinhuepf</groupId>
<artifactId>clij_</artifactId>
<version>0.20.0</version>
</dependency>
To allow maven finding this artifact, add a repository to your pom.xml file:
<repository>
<id>clij</id>
<url>http://dl.bintray.com/haesleinhuepf/clij</url>
</repository>