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25. Four Different Ways to Write a Java Application with More than One Class
Write classes separately, but saved in the same directory
Write classes in the same file/program. The access modifier for supporting class is not allowed (see example in the next slide)
Write the class(es) using package access
Write the supporting class(es) as inner/nested class(es). The access modifier for supporting class is not allowed (see example in the next slide)
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