40 lines
778 B
Java
40 lines
778 B
Java
// typeinfo/Shapes.java
|
|
// ©2016 MindView LLC: see Copyright.txt
|
|
import java.util.*;
|
|
|
|
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) {
|
|
List<Shape> shapeList = Arrays.asList(
|
|
new Circle(), new Square(), new Triangle()
|
|
);
|
|
for(Shape shape : shapeList)
|
|
shape.draw();
|
|
}
|
|
}
|
|
/* Output:
|
|
Circle.draw()
|
|
Square.draw()
|
|
Triangle.draw()
|
|
*/
|