sudo dpkg -i --force-overwrite '/var/cache/apt/archives/openjdk-9-jdk_9~b114-0ubuntu1_amd64.deb'
(Reading database ... 235885 files and directories currently installed.)
Preparing to unpack .../openjdk-9-jdk_9~b114-0ubuntu1_amd64.deb ...
Unpacking openjdk-9-jdk:amd64 (9~b114-0ubuntu1) ...
dpkg: warning: overriding problem because --force enabled:
dpkg: warning: trying to overwrite '/usr/lib/jvm/java-9-openjdk-amd64/include/linux/jawt_md.h', which is also in package openjdk-9-jdk-headless:amd64 9~b114-0ubuntu1
dpkg: warning: overriding problem because --force enabled:
dpkg: warning: trying to overwrite '/usr/lib/jvm/java-9-openjdk-amd64/include/jawt.h', which is also in package openjdk-9-jdk-headless:amd64 9~b114-0ubuntu1
dpkg: dependency problems prevent configuration of openjdk-9-jdk:amd64:
 openjdk-9-jdk:amd64 depends on openjdk-9-jdk-headless (= 9~b114-0ubuntu1); however:
  Package openjdk-9-jdk-headless:amd64 is not configured yet.

dpkg: error processing package openjdk-9-jdk:amd64 (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 openjdk-9-jdk:amd64