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javainheritancesubclasssuperclass

Can you access sub class variable via super class in Java

Can I access my subclass variable via super class instance?

For instance I create my super class object in Main, and then I want to know the value of variable in the sub class. Is it possible to do so? Thanks.

Solution

  • If class B extends class A and you have an A object, then you can always convert it to its subclass, B in this case. Consider the following:

    A a = new A();
B b = (B)a;

    afterwards, you can always reach B members via b. You can do it in an inline manner as well, via ((B)a).