This is a screenshot from my Eclipse program about Powell and Welsh I tried to download the package but I didn't find the way.

This is a screenshot from my Eclipse program about Powell and Welsh I tried to download the package but I didn't find the way.

What you are looking at is a Java compilation error. It means that you are missing some jar files in your classpath. The following seems to be location on the GitHub of the program you are looking for.
https://github.com/Andriantomanga/welsh-powell-graphic-impl
Create an account on GitHub and tried to clone the source, then import it into your eclipse.