# jenv > Command-line tool to manage the "JAVA_HOME" environment variable. > More information: . - Add a Java version to jEnv: `jenv add {{path/to/jdk_home}}` - Display the current JDK version used: `jenv version` - Display all managed JDKs: `jenv versions` - Set the global JDK version: `jenv global {{java_version}}` - Set the JDK version for the current shell session: `jenv shell {{java_version}}` - Enable a jEnv plugin: `jenv enable-plugin {{plugin_name}}`