Comparison between a normal or regular class and a static nested class.
| S.NO | Normal/Regular inner class | Static nested class |
|---|---|---|
| 1. | Without an outer class object existing, there cannot be an inner class object. That is, the inner class object is always associated with the outer class object. | There may be a static nested class object if an outer class object does not exist. That is, the outer class object is not linked to the static nested class object. |
| 2. | Static members cannot be declared inside a normal/regular inner class. | Static members can be declared inside a static nested class. |
| 3. | Regular inner classes cannot be invoked directly from the command prompt because the main() method cannot be declared. | The static nested class can be invoked directly from the command prompt because the main() method can be declared. |
| 4. | Outer class members can be accessed directly, both static and non-static. | A static member of the outer class is the only one that can be directly accessed. |
Note: also read about the Nested Class in Java
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