39 lines
737 B
Java
39 lines
737 B
Java
// typeinfo/Shapes.java
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import java.util.*;
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abstract class Shape {
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void draw() { System.out.println(this + ".draw()"); }
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@Override
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abstract public String toString();
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}
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class Circle extends Shape {
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@Override
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public String toString() { return "Circle"; }
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}
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class Square extends Shape {
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@Override
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public String toString() { return "Square"; }
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}
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class Triangle extends Shape {
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@Override
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public String toString() { return "Triangle"; }
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}
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public class Shapes {
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public static void main(String[] args) {
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List<Shape> shapeList = Arrays.asList(
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new Circle(), new Square(), new Triangle()
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);
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for(Shape shape : shapeList)
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shape.draw();
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}
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}
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/* Output:
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Circle.draw()
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Square.draw()
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Triangle.draw()
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*/
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