ddd、

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();
	}
}

原文地址：https://www.jb51.cc/javaschema/286352.html