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Reusability Tutorial -12 In OOPS(Co-Variant Return Type) In Hindi/URDU

758 views · Published 9 March 2018 · 9:41 · Indexed 30 October 2026

Channel: AndroJavaTech4U · 2018 · Science & Technology

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Java 1.5 supports covariant return types. What does this mean? Before 1.5, when you override a superclass method, the name, argument types and return type of the overrding method has to be exactly same as that of superclass method. Overriding method is said to be invariant with respect to argument types and return type.

If you change any argument type, then you are not really overriding a method -- you are actually overloading it. 

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