Click
Window > Open Perspective > Other... > Java
to change to the Java perspective.
Click
File > New > Other... > Java Project
to open the New Java Project wizard.
Type "Product1" in the Project name field. Click Next.
On the next page, Select "Product1" source folder.
Click Link additional source link in Details pane or button in view bar.
In Link Source click Browse.... and choose the D:\Product1\JavaSourceFiles
directory.
Type "src" in the Folder name field.
Click Finish to validate and close the dialog.
Expand the "src" source folder. Select the empty package "tests"
and set it as source folder using either Use as Source Folder popup-menu item
or button in view bar.
Your project source setup now looks as follows:
D:\Product1\JavaSourceFiles
directory and the D:\Product1\JavaSourceFiles\tests
directory.