In List API:
- List<E> is the base interface for all kinds of list. It defines general operations for a List type.
- Abstract subclasses: AbstractList<E> and AbstractSequentialList<E>
- Concrete implementation classes: ArrayList<E>, Vector<E>, LinkedList<E> and CopyOnWriteArrayList<E>(this class is under java.util.concurrent package).
- Legacy collection: Vector<E>
- Implementation classes in JDK which are not members of Java Collections Framework: AttributeList,RoleList, RoleUnresolvedList and Stack.
The following class diagram describes the hierarchy structure of List API in Java Collections Framework:
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