You'll note the mention of "package-private" in that discussion, which is what Vijitha may be referring to in his/her response (sorry, I'm not certain of the gender of that name). Said another way, you can specify that multiple classes are members of the same package name by adding the statement:
on the first line of code in each class file that you want to be a member of the same package. This 'packaging' increases the visibility of one class to all others in the same package.
You can learn more about the Java package concept, naming conventions, etc., later in the link I included above.
Always learning Java, currently using Eclipse on Fedora.
Linux user#: 501795