/usr/lib/jvm/java-1.7.0-openjdk-amd64 is in openjdk-7-jre-headless 7u181-2.6.14-1~deb8u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/jvm/java-7-openjdk-amd64
/usr/lib/jvm/java-7-openjdk-amd64