Java Program: Up casting Program in inheritance

Program

public class upcasting {
   public static void main(String[] args)
    {
     car c,cc,ccc,o;
     o=new car();
     o.car(); //no casting
     c=(car)new ford(); //upcasting ford sub class to super class
     c.car();
     cc=(car)new benz();//upcasting ford sub class to super class
     cc.car();
     ccc=(car)new BMW();//upcasting ford sub class to super class      
     ccc.car();
   
    }
}
class car
{
    void car()
    {
        System.out.println("This super class car method");
    }
}
class ford extends car
{
    @Override
    void car()
    {
        System.out.println("This sub class Ford car method");
    }
}
class benz extends car
{
     @Override
    void car()
    {
        System.out.println("This sub class Benz car method");
    }
}
class BMW extends car
{
     @Override
    void car()
    {
        System.out.println("This sub class BMW car method");
    }

}

Output