However, the Java Platform provides a data structure that greatly simplifies the use of reference objects like this, called the java.util.WeakHashMap class.

Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields ...

Please use your own words to describe what is your purpose to write this line. A .java file without comment will be graded under a 40% penalty. Make sure that both the .java and .class files are named ...

The address parameters (street address, city, and state) could be in a single address object. The other parameters might not be so easily grouped into a single class with high cohesion.