Freezing state for later use... also:
Feature article: Transparent State Management Using the Decorator Pattern
Weblogs: Gosling and "kitchen sink" Java, Properties in Java, and where is Java SE 7 going?
Java Today: NetBeans 2006 in review, Enigma cipher machine in Java3D, and rewriting old games in Java
Forum postings: Heap size for GlassFish, .NET interoperability, and Java SE 7 anti-features?