overriding toString() method...

The abstract Vegetable class has three subclasses named Potato, Brinjal and Tomato. Write an application that demonstrates how to establish this class hierarchy. Declare one instance variable of type String that indicates the color of a vegetable. Create and display instances of these objects. Override the toString() method of Object to return a string with the name of the vegetable and its color.

abstract class Vegetable
{
public String color;
}

class Potato extends Vegetable
{
public String toString()
{
color = "Brown -skinned Color";
return "potato -->"+color;
}
}

class Brinjal extends Vegetable
{
public String toString()
{
color = "purple color";
return "Brinjal -->"+this.color;
}
}

class Tomato extends Vegetable
{
public String toString()
{
color="red color";
return "Tomato -->"+color;
}
}

class veg_dis
{
public static void main(String [] args)
{
Potato p = new Potato();
Brinjal b = new Brinjal();
Tomato t = new Tomato();
System.out.println(p);
System.out.println(b);
System.out.println(t);
}
}

output