| collection | collections |
|---|---|
| Collection is a base interface. | Collections is a utility class in Java. |
| Collection is an interface in Java. | Collections is a class in Java. |
| Collection defines methods that are used for data structures that contain the objects. | Collections define the methods that are used for operations like access, find, etc. on a Collection. |
| Collection Interface has only abstract methods | Collections consists of only static methods that are used to operate on objects of type Collection. |