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| syntactic unit > access unit > variable > variable declared as a non-primitive data type > variable whose type is an abstract class |
| variable whose type is an abstract class comparison table | ||
| Subject | is a kind of | contain |
|---|---|---|
| variable declared as a non-primitive data type | variable | an instance of a class |
| variable whose type is an abstract class | variable declared as a non-primitive data type | an instance of any subclass of the abstract class |