java学习笔记（二）工厂模式

工厂模式：

 

package net.primary;
/**
 * @Author: Ray
 * @Description:
 * @Date:Create in 16:38 2020/6/24
 * @Modified By:
 */
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 Factory1{
    public static Fruit getInstance(String className){
        if("apple".equals(className)){
            return new Apple();
        }
        if ("orange".equals(className)) {
            return new Orange();
        }
        return null;
        }
}

public class Factory {
    public static void main(String[] args) {
        Fruit f=Factory1.getInstance(args[0]);
　　　　　//Fruit f=Factory1.getInstance("Orange");

        f.eat();

    }
}