jmol with java 10 and ubuntu 18.04 64bit

[Francesco]

Now sage 8.1 is present in the repositories of ubuntu 18.04 64bit. I have installed sage and i have same problems.

When i try to use 3d-commands in shell mode, and jmol stars, i get this message

RuntimeError: jmol cannot run, no suitable java version found

I read that , in another case, this problem is caused by the incompatibility oj java with jmol. In my case java version is 10. Is this the problem ? Can i solve ugrading java or downgrading to version 8 ?

Thanks

[slelievre]

Mon 2018-05-14 13:03:02 UTC, Francesco:

You can work around these issues by choosing a different viewer,

like "threejs" for instance. For example:

    sage: p = plot3d(lambda x, y: x^2 + y^2, (-2,2), (-2,2))

    sage: p.show(viewer='threejs')

    Launched html viewer for Graphics3d Object

I don't know if there is a way to set threejs as the default viewer

for 3d graphics.

[Francesco]

I know of the existence of this viewer, but the quality and the options of jmol aren't the same.

 

[slelievre]

Jmol problems with Java 10 have been reported before.
They might be solved by the upgrade to Jmol 14.29.10.

Progress on this is tracked at

- Sage Trac ticket #25026

  Update jmol to version 14.29.10

  https://trac.sagemath.org/ticket/25026

You could try building Sage from source, modifying the

source by applying the branch on this Sage Trac ticket.

[Emmanuel Charpentier]

I've got that. The easiest workaround was to set the default Java engine to Java 8. In Debian and Debian-derived distributions, this is most-easily done with /usr/sbin/update-java-alternatives.

I don't recall having had this problem recently. But Debian testing just recently got Java 10.

HTH,

--

Emmanuel Charpentier

[Francesco]

Ok I have got two version of java and I change when I want with /usr/sbin/update-java-

alternatives....jmol needs java 8

Thanks !!