Thanks Dorin and Keet but SH3D still doesn't work with KDE

Latest trial

Download Java 8 for Linux x64 from https://www.java.com/fr/download/linux_manual.jsp

sudo mkdir /usr/java
sudo mv ~/Téléchargements/jre-8u481-linux-x64.tar.gz /usr/java
cd /usr/java
sudo tar zxvf jre-8u481-linux-x64.tar.gz

Change "$PROGRAM_DIR"/runtime to /usr/java/jre1.8.0_481 in ~/SweetHome3D-7.5/SweetHome3D-Java3D-1_5_2
cd SweetHome3D-7.5/
./SweetHome3D-Java3D-1_5_2 &> ~/SH3D_jre1.8.0_481.txt

Try =============================================================================
Java 3D: implicit antialiasing enabled
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at sun.awt.X11FontManager.getFileNameFromPlatformName(X11FontManager.java:174)
(...)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

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