The following question looks at references to objects and their superclasses. In

Question

The following question looks at references to objects and their superclasses. Indicate whether or not the indicated statement is a LEGAL statement ("will it compile?"). If it is legal, then give the output generated by that statement and explain why.

public class RefTest
{
   public static void main(String [] args)
   {
      Carrot bunny = new Carrot();
      Vegetable vege = bunny;
      vege.root();    // LEGAL?
   }
}

class Vegetable
{
   public void color()
   {
      System.out.println("in vegetable");
   }

   public void sweet()
   {
      System.out.println("sweet");
   }
}

class Carrot extends Vegetable
{
   public void color()
   {
      System.out.println("in carrot");
   }

   public void root()
   {
      System.out.println("root");
   }
}

Explanation / Answer

Sorry it is not legal to use vege.root();

because root() doesn't belongs to carrot class so to access it you need to use carrot obj

example

Carrot bunny = new Carrot();
Vegetable vege = bunny;
bunny.root(); // LEGAL

i have used bunny obj to call root(), it works perfectly

output:

root

Here is complete code:

public class HelloWorld
{
public static void main(String [] args)
{
Carrot bunny = new Carrot();
Vegetable vege = bunny;
bunny.root(); // LEGAL?
}
}

class Vegetable
{
public void color()
{
System.out.println("in vegetable");
}

public void sweet()
{
System.out.println("sweet");
}
}

class Carrot extends Vegetable
{
public void color()
{
System.out.println("in carrot");
}

public void root()
{
System.out.println("root");
}
}

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.