# Overlapping products in a common source tree

### Layout on file system

- The Java source files for products are all held in a single main directory.
- Products are separated into four siblings packages `Product1`, `Product2`, `Product3` and `Product4`.

### Steps for defining corresponding "Product1" and "Product2" projects

1. Click Window > Open Perspective > Other... > Java to change to the Java perspective.

2. Click File > New > Other... > Java Project to open the New Java Project wizard.

3. Type "Product1" in the Project name field. Click Next.

4. On the next page, Select "Product1" source folder.

   Click Link additional source link in Details pane or button in view bar.

5. In Link Source click Browse.... and choose the `D:\AllJavaSourceFiles` directory.

   Type "src" in Folder name.

6. Click Finish to validate and close the dialog.

7. Expand the "src" source folder. Select the three last packages and exclude them from build path using either Exclude from build path link or Exclude popup-menu item.

8. Your project source setup now looks as follows:

9. Click Finish.

10. Copy "Product1" project and paste it as "Product2".

    Edit "Product2" project properties and go on Java Build Path page.

    In Source tab, expand "Product2/src" source folder, select Excluded and click Edit....

11. In Inclusion and Exclusion Patterns, select "com/xyz/product2" and click Edit....

12. Change "com/xyz/product2" to "com/xyz/product1".

13. Click OK to enter the change.

    Click Finish to validate and close Inclusion and Exclusion Patterns dialog.

    Click OK again to validate "Product2" project properties changes.

14. You now have two Java projects which respectively contain the sources of "product1", "product2".

### Related concepts

Java projects
Java views

### Related references

New Java Project Wizard
Package Explorer View