Require override of method to call super

Question

I want that when a child class overrides a method in a parent class, the super.method() is called in that child method.

Is there any way to check this at compile time?
If not, how would I go about throwing a runtime exception when this happens?

Answer 1

There's no way to require this directly. What you can do, however, is something like:

public class MySuperclass {     public final void myExposedInterface() {         //do the things you always want to have happen here          overridableInterface();     }      protected void overridableInterface() {         //superclass implemention does nothing     } }  public class MySubclass extends MySuperclass {     @Override     protected void overridableInterface() {         System.out.println("Subclass-specific code goes here");     } } 

This provides an internal interface-point that subclasses can use to add custom behavior to the public myExposedInterface() method, while ensuring that the superclass behavior is always executed no matter what the subclass does.