referencing another project in eclipse

Question

1. I created project A with package name "A"

2. I created another project called "B"

3. Properties->Java Build Path->Modulepath
   added "A"

4. project B has a source file with "import A" statement

I get "The package A is not accessible"

Answer 1

Option 1: You have the package or the project A stored into another folder. Option 2: You've deleted A or any content related with A so it's not there anymore

Answer 2

That you have added the project to the modulepath and not to the classpath means that you are using Java Platform Module System ( JPMS ) : each of the two projects contains the file module-info.java in the default package .

You have two options:

• In the module-info.java files do the following:
  • Project A must export the packages that you want to use in project B:
    In module-info.java of project A add for each exported package a line
    exports <package-to-export>;
  • In project B the dependency to the module of project A must be defined:
    In module-info.java of project A add the line
    requires <project-A-module-name>;
• Delete both module-info.java files (in most cases this is the recommended solution)