多态的实现

abstract class Beverage {
    abstract void Brew();
    abstract void addCondiments();
    final void prepare(){
        boilWater();
        Brew();
        poulnCup();
        if(customerWantsCondiments()){
            addCondiments();
        }
        serve();
    }
    private void boilWater(){
        System.out.println("boiling water...");
    }
    private void poulnCup(){
        System.out.println("pouring into a cup...");
    }
    private boolean customerWantsCondiments(){
        return true;
    }
    private void  serve(){
        System.out.println("serving the beverage.");
    }
}
class Coffee1 extends Beverage{
    @Override
    public void Brew(){
        System.out.println("Brewing coffee");
    }
    @Override
    public void addCondiments(){
        System.out.println("add suger and milk..");
    }
}
class Tea extends Beverage{
    @Override
    public void Brew(){
        System.out.println("Brewing tea");
    }
    @Override
    public void addCondiments(){
        System.out.println("add lemon and honey..");
    }
}