I have installed in the Eclipse IDE version 4.9.0 through the installer provided on the "Eclipse" home site and everything has worked well. After that, I have launched this application with the command line: ---->/opt/eclipse/jee-2018-09/eclipse/eclipse
Then the application started normally and the Eclipse Icon appeared correctly in the toolbar. After that I tried to access the Icon configuration but I couldn't manage to find out the right item in the menus in order to make this Icon permanent. And the consequence of this is that the Eclipse Icon disappears when I close the application. Usually, when I install applications through the Ubuntu package manager, I don't get any problems to make the application Icon permanent. But through a manual package installation, the Icon behaviour seems to be different. Many thanks if somebody has an idea to help me. Cordially Bye Mark