android_Text的专栏

首先先看一下抽象产品和具体产品类（Product）药品类package com;/** * 药品 * * @author ZHANGHAOHAO089 * @date 2017/12/13 */public abstract class Medicine { public abstract void getName(); public abstract void getNu

package com.SingletonDesign;/** * 单例模式恶汉式加载 * * @author ZHANGHAOHAO089 * @date 2017/12/14 */public class SingletonDesign { private static SingletonDesign singletonDesign = new SingletonDesign(