The minimum version check excludes Java 8 (and probably 9 and 10 even though they don't exist). See the attached screen shot. I expected an minimum version check to allow the higher Java version.
For now, there is a line in the launch script that looks like:
$JAVACMD -cp "$UNIX_STYLE_HOME/lib/versioncheck.jar" JavaVersionChecker 1.6 1.7
You could try appending 1.8 to the end of that line until we fix the scripts.