For more details refer openjdk vs oracle jdk Main difference between Oracle JDK and OpenJDK is that OpenJDK is free for all while Oracle Java Development Kit or Oracle JDK requires commercial license. OpenJDK is the short form of Open Java Development Kit similar to Oracle's Java Development Kit used to develop Java Applications. OpenJDK Community Version What is OpenJDK Quick guide to download and install OpenJDK 10 on Windows.