It is easy to generate Java classes using the xjc binding compiler provided with the Oracle’s JDK 7 implementation. This is shown in the next screen snapshot.

Here's how to make classes, fields, methods, constructors, and objects work together in your Java programs.

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