I try to make changes in java code but Eclipse not see it. For example i says:
System.out.println("WKT");
And exspect to see:
WKT
But not see it.
10 minutes ago all works fine. Now i see strange project icon in project manager:

Whats can be wrong?
The project is not getting compiled. I can see some errors in the projects. Some dependent project might be throwing error due to which it is not getting compiled.
Try fixing those errors, clean your project and then you should be able to see the desired output
Your code may not have any error but the project is compiled as a whole.
In case, it is not successfully compiled, the output will be of an old class version i.e. you cannot see any changes you make in the code.
Try
Eclipse : Window -> Show View -> Problems. You will see all the problems in a window and you can fix them one by one