Java开发练习4，多态

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第5章 4编程题

设计一个动物声音“模拟器”，希望模拟器可以模拟许多动物的叫声

public abstract class Animal {abstract void cry();abstract String getAnimalName();}

public class Dog extends Animal{void cry() {// TODO Auto-generated method stubSystem.out.println("wangwang!");}String getAnimalName() {// TODO Auto-generated method stubreturn "狗";}}

public class Cat extends Animal{@Overridevoid cry() {// TODO Auto-generated method stubSystem.out.println("miao~");}@OverrideString getAnimalName() {// TODO Auto-generated method stubreturn "è";}}

public class Simulator {void playSound(Animal animal){System.out.println(animal.getAnimalName()+"的声音");animal.cry();}}

public class Application {public static void main(String[] args) {// TODO Auto-generated method stubSimulator simulator = new Simulator();simulator.playSound(new Dog());simulator.playSound(new Cat());}}

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