Preliminaries
Common classes
Examples
A useful and demonstrating list of examples
Visitor
Visit without entering
Stateful class
Add a state to your class
Composition
Towards a functional approach
State
A changing state
Comparator
Compare the elements
Strategy
Multimethod as strategy
Factory
Create the elements
Observer
Observe the elements
Queue
Producer and consumer
ToString
Another way of definition
Tree walker
Walk without falling