Make classes public, but remain private to a JAR file

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Is there a way to make a Java class public but only public with a JAR file? AKA, it's not package private, instead it's package public, but it's not JAR public?

Say I have a structure like this:

project/   package1/     One.java   package2/     Two.java   package3/     Three.java 

Since the 3 .java files are in different packages, I need to make things public. But is there a way to make them only public to the JAR that will contain the project? Such that if another project imports the JAR, it can't see certain public classes/field?

 


Using project Jigsaw in Java 9 you can do exactly that where you can decide on the packages you want to export. For example:

module com.yourproject {   exports com.yourproject.package1; } 

This will make sure that only package1 is exported.

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