OpenJDK is licensed under the GPL. So as long as Google doesn't violate the terms of the GPL it's quite safe to use it. In addition, the GPL provides an implici

OpenJDK is licensed under the GPL. So as long as Google doesn't violate the terms of the GPL it's quite safe to use it. In addition, the GPL provides an implicit patent grant to the code: https://copyleft.org/guide/comprehensive-gpl-guidech7.html https://copyleft.org/guide/comprehensive-gpl-guidech7.html