JAVA基础之反射

1.认识反射

利用对象找到对象的出处，在object中类有一个方法叫做getClass();

2.反射机制

class对象的实例化

3.工程模式

package com.basic.casef;

interface Fruit{

public void eat();

}

class Apple implements Fruit{

public void eat() {

System.out.println("**吃苹果！***");

}

}

class Orange implements Fruit{

public void eat() {

System.out.println("***吃橘子！***");

}

}

class Factory{

public static Fruit getInstance(String className) throws InstantiationException, IllegalAccessException, ClassNotFoundException{

Class cls = Class.forName(className);

Fruit o = (Fruit)cls.newInstance();

return o;

}

}

public class TestFactory {

public static void main(String[] args) throws InstantiationException, IllegalAccessException, ClassNotFoundException {

Fruit apple = Factory.getInstance("com.basic.casef.Apple");

Fruit orange = Factory.getInstance("com.basic.casef.Orange");

apple.eat();

orange.eat();

}

}