摘要：
public abstract class Bank { public void ticket() { System.out.println("排队取号"); } public abstract void manageMoney(); public void giveMark() { System.out.println(... 阅读全文
摘要：
单例模式之 饿汉式 单例模式之 懒汉式 阅读全文
摘要：
public interface Star { public void confer(); public void sign(); public void bookTicket(); public void sing(); public void collectMoney(); } public class RealStar implements ... 阅读全文
摘要：
public interface Fruit { public void eat(); } public class Apple implements Fruit { @Override public void eat() { System.out.println("吃苹果"); } } public class Orange imple... 阅读全文