Minimal Submitted Files

You are required, but not limited, to turn in the following source files:

Assignment8.java(More code need to be added)
ZipInfo.java(given by the instructor, it needs to be modified for this assignment)
ZipcodeComparator.java
CityStateComparator.java
Sorts.java
PostOffice.java

Requirements to get full credits in Documentation

1. The assignment number, your name, StudentID, Lecture number/time, and a class description need to be included at the top of each file/class.
2. A description of each method is also needed.
3. Some additional comments inside of methods(especially for the “main” method) to explain code that are hard to follow should be written.

You can look at the Java programs in the text book to see how com