Cursor

Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation.

Use the Iterator pattern

• to access an aggregate object's contents without exposing its internal representation
• to support multiple traversals of aggregate objects
• to provide a uniform interface for traversing different aggregate structures

• java.util.Iterator
• java.util.Enumeration

• Design Patterns: Elements of Reusable Object-Oriented Software