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){

if("apple".equals(calssName)){

return new Apple

}else{return new Orange}}

public class TestDemo{

public static void main(String args[]){

Fruit f=Factory.getInstance("apple");

f.eat();

}}
}

java简单工厂模式