All the classes released in Java 2 that implement the collection interface contain an iterator () method, which returns an instance of the Iterator. There's nearly universal support for the Iterator ...

Filtering Iterator nuts and bolts As the filtering Iterator implements the java.util.Iterator interface, it must provide implementations for the methods defined within that interface.

The interfaces java.util.List and java.util.Set extend Collection, representing more specialized data structures and adding more operations and/or constraints. List represents a sequence of ...