import java.io.*; import java.util.*; 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 name)throws Exception{ Fruit f = null; if("apple".equals(name)){ f = new Apple(); } else if("orange".equals(name)){ f = new Orange(); } if(f!=null){ return f; } else return null; } } public class FactoryDemo01{ public static void main(String args[])throws Exception{ Fruit f = Factory.getInstance("apple"); f.eat(); } }