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 why.

public class RefTest
{
   public static void main(String [] args)
   {
      Vegetable vege = new Vegetable();
      vege.color();    // 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");
   }
}

Question options:

	1) ILLEGAL - will not compile
	2) LEGAL - output is "in vegetable"
New
	3) LEGAL - output is "sweet"
	4) LEGAL - output is "in carrot"
	5) LEGAL - output is "root"

Answer 1

answer is

2)	LEGAL - output is "in vegetable"

Why?

Vegetable vege = new Vegetable();
vege.color(); // LEGAL

as you can see ... vege is object refers to Vegetable class

Vegetable class has color() and sweet() methods

so vege.color(); call color() in Vegetable class.

Output is

in vegetable