Toggle JDK in Gentoo Christoph Frick - ofnir.net 2014-06-27 function jdk { export GENTOO_VM=oracle-jdk-bin-1.$1 export JDK_HOME=/usr/lib/jvm/oracle-jdk-bin-1.$1 export JAVA_HOME=/usr/lib/jvm/oracle-jdk-bin-1.$1 java -version } e.g. jdk 8