今天学习Spring3框架,在理解模拟实现Spring Ioc容器的时候遇到了getInterfaces()方法。getInterfaces()方法和Java的反射机制有关。它能够获得这个对象所实现的接口。
例如:
Class<?> string01 = person.getClass().getInterfaces()[0];
//获得person对象所实现的第一个接口
详细的例子如下:
Person类:
package com.deciphering.spring; public class Person implements eagle,whale{ private String name = "小明"; private int id = 10001; public void Speak(String name){ System.out.println("我的名字"+name+" "+ "编号"+ id); } @Override public void fly() { System.out.println("I can Fly!!!"); } @Override public void swim() { System.out.println("I can swimming!!!"); } public static void main(String args[]){ Person person = new Person(); person.Speak("小明"); person.fly(); person.swim(); System.out.println("---------------"); Class<?> string01 = person.getClass().getInterfaces()[0]; Class<Person> string02 = (Class<Person>) person.getClass().getInterfaces()[1]; System.out.println(string01); System.out.println(string02); } }
eagle接口:
package com.deciphering.spring; public interface eagle { public void fly(); }
whale接口:
package com.deciphering.spring; public interface whale { public void swim(); }
运行结果: