java反射实现工厂模式

package Reflect;

interface fruit{
public abstract void eat();
}

class Apple implements fruit{
public void eat(){
System.out.println("Apple");
}
}

class Orange implements fruit{
public void eat(){
System.out.println("Orange");
}
}

class Factory{
public static fruit getInstance(String ClassName){
fruit f=null;
try{
f=(fruit)Class.forName(ClassName).newInstance();
}catch (Exception e) {
e.printStackTrace();
}
return f;
}
}

//这样实现无伦你添加多少实现类都不用再改写工厂
class hello{
public static void main(String[] a){
fruit f=Factory.getInstance("Reflect.Apple");
if(f!=null){
f.eat();
}
}
}