Java™ is the world's leading programming language and platform. The code for Java is open source and available at OpenJDK™. AdoptOpenJDK provides prebuilt OpenJDK JRE binaries from a fully open source set of build scripts and infrastructure. Don't install the X backend for AWT, needed by some GUIs (used to be X flag) Allow this JDK to be recognised by Gentoo (package manager, eselect, java-config, EXPERIMENTAL!)