I find it difficult to export classes from one project into JAR file, so that I could import it in another project. 

How do I try?

I right-click on project in *Package Explorer* -> *Export* -> *Java* -> *JAR file* -> select all the packages I need. *'Export generated class files and resources'* option is checked, other options are left unchecked. Then I click *Finish*.

When I import such generated .jar file into the dependent I encounter a list of errors:

`The import pl.abc.xyz cannot be resolved`

`Xyz cannot be resolved to a type`

It seems like the classes from the JAR file were not found by the compiler. 

Please correct me, if I do it in a wrong way. Thanks.