Currently the v7 runtime is configured as preferred:
====================================
$ update-java-alternatives --list
java-1.7.0-openjdk-amd64 1071 /usr/lib/jvm/java-1.7.0-openjdk-amd64
java-1.8.0-openjdk-amd64 1069 /usr/lib/jvm/java-1.8.0-openjdk-amd64
====================================
Yet as of v0.1.28, programs like freeplane start to use v8. I discovered
this as freeplane started to segfault occassionally, so I have now
installed and held the previous java-wrappers version.
Debian Release: stretch/sid
990 testing www.deb-multimedia.org
990 testing 10.1.0.3
500 unstable 10.1.0.3
500 quodlibet-unstable 10.1.0.3
1 experimental 10.1.0.3
--- Package information. ---
Depends (Version) | Installed
======================-+-===========
unzip | 6.0-17
Package's Recommends field is empty.
Package's Suggests field is empty.