面相对象程序设计——多态性

1、面相对象程序设计面相对象程序设计多态性多态性Java 程序设计Java 程序设计多态性的概述多态性的概述上溯造型的概念上溯造型的概念重载与重写重载与重写抽象类和抽象方法抽象类和抽象方法Final类类 接口接口Java 程序设计Java 程序设计class Square extends Shape void draw() System.out.println(Square.draw(); void erase() System.out.println(Square.erase(); class Triangle extends Shape void draw() System.out.print

2、ln(Triangle.draw(); void erase() System.out.println(Triangle.erase();Java 程序设计Java 程序设计public class Shapes public static Shape randShape() switch(int)(Math.random() * 3) default: / To quiet the compilercase 0: return new Circle();case 1: return new Square();case 2: return new Triangle();public stati

3、c void main(String args) Shape s = new Shape9;for(int i = 0; i s.length; i+)si = randShape();for(int i = 0; i s.length; i+)si.draw(); 方法调用的绑定与运行时多态Java 程序设计Java 程序设计Java 程序设计Java 程序设计Java 程序设计interface CanFight void fight(); interface CanSwim void swim();interface CanFly void fly();class ActionChara

4、cter public void fight() class Hero extends ActionCharacter implements CanFight, CanSwim, CanFly public void swim() public void fly() Java 程序设计public class Adventure static void t(CanFight x) x.fight(); static void u(CanSwim x) x.swim(); static void v(CanFly x) x.fly(); static void w(ActionCharacter x) x.fight(); public static void main(String args) Hero i = new Hero();t(i); / Treat it as a CanFightu(i); / Treat it as a CanSwimv(i); / Treat it as a