class ctest19{
    public static void main(String args[]){
        superClass obj[] = new superClass[3];

        obj[0] = new subClassA();
        obj[1] = new subClassB();
        obj[2] = new subClassC();

        for (int i = 0 ; i < 3 ; i++){
            obj[i].dispName();
        }
    }
}

class superClass{
    public void dispName(){
        System.out.println("未定義です");
    }
}

class subClassA extends superClass{
    public void dispName(){
        System.out.println("製品名はXXXです");
    }
}

class subClassB extends superClass{
    public void dispName(){
        System.out.println("製品名はYYYです");
    }
}

class subClassC extends superClass{
    public void dispName(){
        System.out.println("製品名はZZZです");
    }
}