Require override of specific methods of a non-abstract class

Question

Is it possible to have a class defined like

public class MyClass
{
    public void methodA(){} // Inherit
    public void methodB(){} // Inherit
    public void methodC(){} // Require override
}

and then have all classes which extend from MyClass to be required to override methodC() but just simply inherit methodA() and methodB()?

If it is possible, how does one do it? If it's not possible, can you propose an alternative solution to achieve a similar result?

EDIT:

I need a non-abstract class because I want to be able to instantiate this class too.

Answer 1

You would have to make your base class abstract.

public abstract class MyClass
{
    public void methodA(){} // Inherit
    public void methodB(){} // Inherit
    public abstract void methodC(); // Require override
}

Answer 2

You cannot require an override of a non-abstract method.

Maybe you can do something similar to the template method pattern:

 public final void methodC() { methodC1(); someMoreLogic(); methodC2();}

 protected abstract void methodC1();

 protected abstract void methodC2();

Here methodC encapsulates a fixed algorithm that calls into pieces that have to be supplied by the subclasses.