Duke thinking What is this? The place to collaborate on an open-source implementation of the Java Platform, Standard Edition, and related projects. (Learn more.)
Duke plugging Download and install the open-source JDK for most popular Linux distributions. Oracle's free, GPL-licensed, production-ready OpenJDK JDK 15 binaries are at jdk.java.net/15; Oracle's commercially-licensed JDK 15 binaries for Linux, macOS, and Windows, based on the same code, are here.
Duke chalkboard Learn how to use the JDK to write applications for a wide range of environments.
Duke hacking Hack on the JDK itself, right here in the OpenJDK Community: Browse the code on the web, clone a Mercurial repository to make a local copy, and contribute a patch to fix a bug, enhance an existing component, or define a new feature.