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  • Breaking Now

    Give an example where upcasting takes advantage of polymorphism.

    Here it goes:

    class Parent { }

    class Child extends Parent { }

    Child can be referred as an object of type Parent or Child.

    Upcasting works like this:

    Child aChildObj = new Child();

    Parent aParentObj = (Parent)aChildObj;

    As aChildObj can be referred to by the class names Child and
    Parent,you can say that this upcasting and type extension is the
    implementation of polymorphism in Java.

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