sweethome3d fails to launch with NoSuchMethodError: sun.awt.X11GraphicsConfig.getDevice()

When launching sweethome3d on Ubuntu 19.04, I get:

```
Exception in thread "J3D-Renderer-1" java.lang.NoSuchMethodError: sun.awt.X11GraphicsConfig.getDevice()Lsun/awt/X11GraphicsDevice;
 at javax.media.j3d.X11NativeConfigTemplate3D.isGraphicsConfigSupported(X11NativeConfigTemplate3D.java:181)
 at javax.media.j3d.NativePipeline.isGraphicsConfigSupported(NativePipeline.java:3341)
 at javax.media.j3d.Renderer.doWork(Renderer.java:533)
 at javax.media.j3d.J3dThread.run(J3dThread.java:275)
```

Tested with java-8-openjdk-amd64 and java-11-openjdk-amd64 akternatives, but it doesn't change anything.

The application GUI doesn't launch. If launching using terminal, the java process don't shutdown without explicit SIGTERM.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: sweethome3d 6.1.2+dfsg-2
ProcVersionSignature: Ubuntu 5.0.0-27.28-generic 5.0.21
Uname: Linux 5.0.0-27-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.10-0ubuntu27.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue Sep 3 21:42:06 2019
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-08-02 (2587 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: sweethome3d
UpgradeStatus: Upgraded to disco on 2019-05-05 (121 days ago)