What is jenv? jenv is Java environment manager, and it is a clone of RVM for Java. jenv can manage parallel versions of Java development kits on any Unix based system. It provides a convenient command line interface for installing, switching, removing and listing Candidates. Why jenv? Easy to manage Java version, such as 1.6, 1.7, 1.8 and 1.9 Easy to install Java tools, such as Ant, Maven, Tomcat