题目要求：

开放性题目，随意发挥；

建立一个武器集合，包括添加武器，遍历武器使得各武器能充分发挥功能，其中功能包括可移动、可攻击。最好不要面向具体编程，降低程序的耦合度，提高扩展力，再添加过程中若出现武器满的情况在控制台作出反馈，但不停止程序

测试类

package zhandou;import java.util.ArrayList;
import java.util.List;public class text{public static void main(String[] args) {List<Weapon> weaponList = new ArrayList<>();Weapon GaoShePao = new GaoShePao("C");Weapon TanKe = new TanKe("A");Weapon YunShuJi = new YunShuJi("B");Weapon ZhanDouJi = new ZhanDouJi("D");weaponList.add(GaoShePao);weaponList.add(TanKe);weaponList.add(YunShuJi);weaponList.add(ZhanDouJi);try {if (weaponList.size() > 4)throw new WeaponException("越界");} catch (WeaponException e) {System.out.println(e.getMessage());}for(Weapon data:weaponList){if (data instanceof Moveable) {Moveable m = (Moveable) data;m.move();System.out.println("$$$$$$$$$$$");}if (data instanceof Shootable) {Shootable b = (Shootable) data;b.shoot();System.out.println("############");}}}
}

 武器越界异常

package zhandou;public class WeaponException extends Exception{public WeaponException() {}public WeaponException(String message) {super(message);}
}

 移动接口

package zhandou;public interface Moveable {void move();
}

射击接口 

package zhandou;public interface Shootable {void shoot();
}

 父类：武器

package zhandou;public class Weapon {}

子类： 战斗机

package zhandou;public class ZhanDouJi extends Weapon implements Shootable,Moveable{private String name;public String getName() {return name;}public void setName(String name) {this.name = name;}public ZhanDouJi(String name) {this.name = name;}public ZhanDouJi() {}public void shoot() {System.out.println("战斗机射击！");}public void move(){System.out.println("战斗机起飞！");}
}

子类：高射炮 

package zhandou;public class GaoShePao extends Weapon implements Shootable{private String name;public GaoShePao(String name) {this.name = name;}public GaoShePao() {}public void setName(String name) {this.name = name;}public String getName() {return name;}public void shoot() {System.out.println("高射炮射击！");}
}

 子类：坦克

package zhandou;public class TanKe extends Weapon implements Moveable,Shootable{private String name;public String getName() {return name;}public void setName(String name) {this.name = name;}public TanKe() {}public TanKe(String name) {this.name = name;}public void move() {System.out.println("坦克启动！");}public void shoot(){System.out.println("坦克射击！");}
}

 子类：运输机

package zhandou;public class YunShuJi extends Weapon implements Moveable{private String name;public String getName() {return name;}public void setName(String name) {this.name = name;}public YunShuJi() {}public YunShuJi(String name) {this.name = name;}public void move() {System.out.println("运输机起飞！");}
}

题后总结 ：

1）抛出异常方面代码思路不够明确，其中若自定义集合中的异常，不知道如何写，只能出现自抛自抓的情况

2）父类型能转型称为接口类型，没有想到真的能实现，是在测试中发现的；

3）以后写程序要把接口、类、放在不同的Java class/interface，思路更加清晰