How to call an non overide method of child class using parent object reference

Question

Here is my code want to access child class method of AdapterVer1 getAdaptObj1() (without type casting) using object reference of AdapterVersion (Parent class)

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Answer 1

Rohit already explained it beautifully. Just to add my 2 cents, you should first check the subclass type and then typecast, for instance:

if(adapter instanceof Adapterver1) {
    ((AdapterVer1)adpater).getAdaptObj1();
}

This way your code will be safer if it tries to handle a new subclass which doesn't declare such method.

But the question you must ask, if you already know what subclass method to call, why accessing it from superclass reference?