如何用接口定义多态？

Answer 1

public interface clothes{}public class Coat implements clothes{}public Person{    public void wear(Clothes coat){    }}public PersonTest{    public static void main(String[] args){        Person p = new Person();        Clothes coat = new Coat();        p.wear(coat);    }}黑体就是多态了。多太有什么好处？多态可以消除复杂的条件语句或者switch语句，详情请查询关键词“工厂模式 多态 switch 消除”