Hi Virginie,
Stambia Designer S19.1 will require Java 8+ (mainly because we upgraded our Eclipse platform).
To be realistic, this means Java 8 or Java 11 (versions 9 and 10 are not released with "Long Term Support" by Oracle, so practically they were not adopted by users...).
The Runtime shipped with Designer 19.1 will be compatible with Java 8 and Java 11, we don't know yet if it will work with Java 6&7.
Java 7 and 8 are quite stable and we never had any Stambia support case related to a Java bug requiring a Java fix...
These java versions are still downloadable from the
Oracle Java Archive
.
There is no emergency to upgrade your Java versions.
We will provide more information
in this article
soon.