public class danpost
{
  boolean inDan=true;
}
public class Rr extends danpost
{
   public void printBoolean()
   { System.out.print("Your answer is: "+super.inDan); }
}
public class plzPrintIt
{
   public static void main()
    {
       Rr rr = new Rr();
       rr.printBoolean();
    }
}

abstract class RcCookie  
{  
    abstract void TastyCookie();        
}  
class Rr extends RcCookie  
{   
   void TastyCookie() 
   {  
    System.out.printlnn("danpost");       
   }  
}  
  
public class cheese
{  
  
    public static void main()
    {  
  
    Rr rr=new Rr();  
    rr.TastyCookie();  
    }         
}

Object world = new MyWorld();
int ww = world.getWidth(); // fails
// Object class, which has no parents, does not declare a getWidth method

World world = new MyWorld();
int ww = world.getWidth(); // succeeds
// method is declared in the World class

Object world = new MyWorld();
int ww = ((World)world).getWidth(); // succeeds
// Object is typecast to World where method is declared

MyWorld world = new MyWorld();
int ww = world.getWidth(); // succeeds
// method is inherited into MyWorld class from World