subclass - What is the difference between Super thing = new Sub() and Sub thing = new Sub()? -

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  super comma = new sub (); Subject = new sub ();

What is the difference between talking and what can I do with it?

The difference is that variabele super chess is assigned to any other subclass Can be done which implements super while sub-item can be assigned only to any other sub class.

He said, new sub () to super thing polynomiality and overriding Uses, from which you can find a good tutorial. You can call only the methods defined in the class super if one of the subtracted (read: redefined) subpages on these methods, polymorphism ensures that the class super In the method instead of the override method is called.


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