Vs Code java The import cannot be resolved

I recently moved from windows 10 to Ubuntu 16.04, I'm a java developer, when I was on windows I installed Vs Code with the java Extension pack. On windows I never Had problem to make my daily work, but on ubuntu, every java file is marked as error, with the message "The import cannot be resolved", searching a litle bit, i found that you can execute the command java:clean the java language server workspace, but this does not fix the problem. I also remove the tmp files from the workspace located on:

~/.config/Code/User/workspaceStorage

• the current Version of Vs code is 1.41.1

• the current version of Java Extension Pack is 0.8.1

Any ideas?.

Regards!.