// typeinfo/Shapes.java

// (c)2016 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://mindviewinc.com/Books/OnJava/ for more book information.

import java.util.stream.*;

abstract class Shape {

void draw() { System.out.println(this + ".draw()"); }

@Override

abstract public String toString();

}

class Circle extends Shape {

@Override

public String toString() { return "Circle"; }

}

class Square extends Shape {

@Override

public String toString() { return "Square"; }

}

class Triangle extends Shape {

@Override

public String toString() { return "Triangle"; }

}

public class Shapes {

public static void main(String[] args) {

Stream.of(new Circle(), new Square(), new Triangle())

.forEach(Shape::draw);

}

}

/* Output:

Circle.draw()

Square.draw()

Triangle.draw()

*/