It defines group of classes and interfaces which can be used for representing a collection of Objects as single entity.

9 key Interfaces of collection framework

  • This interface is the root interface for entire collection framework.
  • This interface can be used for representing a group of objects as single entity.
  • This interface defines the most common general methods which can be applicable for any collection object.
  • There is no concrete class which implements collection interface can refer to this Collection interface API

Note:Vector and Stack classes are re engineered in 1.2v to fit into new collection framework by implementing List interface.