Call super class method automatically

Question

Consider the following class

class A{
    public void init(){
        //do this first;
    }
    public void atEnd(){
        //do this after init of base cl         


        

Answer 1

Make init() final, and provide a separate method for people to override that init() calls in the middle:

class A{
    public final void init(){
        //do this first;
    }

    protected void initCore() { }

    public void atEnd(){
        //do this after init of base class ends
    }
}

class B1 extends A{

    @Override
    protected void initCore()
    {
        //do new stuff.
    }
}