1 | Class: A template for an object which contains variables and methods which can be inherited from other superclasses and whose calling sequence and existence can be defined by interfaces |
2 | Object or Instance: A particular realization of some class; different instances usually have different values for their variables or instances but the same methods |
3 | Simple types: variables defined by int, char etc. are NOT objects but each has an associated wrapper class which can be used with greater power but lower efficiency |
4 | Superclass: A class further up in the inheritance tree |
5 | Subclass: A class further down in the inheritance tree |
6 | Abstract classes:contain abstract methods which are not implemented and only define interfaces. Subclasses will provide implementations |