面向对象设计作业(二)

1.机器人设计

设计一种机器人,可以移动,变形。机器人有控制芯片,可以更换,并且根据机器人内部的芯片,更改行为方式,比如移动方式有步行,跑步等,变形可以变成汽车,飞机等。

要求:

1、给出面向对象的设计(类图);

2、给出Java代码实现。

interface ControlChip{
    void move(); //控制芯片接口
    void transform();
}
class Robot{
    //机器人类
    ControlChip controlChip;
    public Robot(ControlChip controlChip){
        this.controlChip=controlChip; //构造方法
    }
    public void move(){
        controlChip.move(); //控制芯片对应的移动方法
    }
    public void transform(){
        controlChip.transform();
    }
}
class WalkControlChip implements ControlChip{
    //步行芯片

    @Override
    public void move() {
        System.out.println("步行。。。");
    }

    @Override
    public void transform() {
        System.out.println("变形");
    }
}
class RunningControlChip implements ControlChip{
    //跑步芯片
    @Override
    public void move() {
        System.out.println("跑步。。。");
    }

    @Override
    public void transform() {
        System.out.println("变形");
    }
}
class CarControlChip implements ControlChip{
    //汽车芯片
    @Override
    public void move() {
        System.out.println("移动");
    }

    @Override
    public void transform() {
        System.out.println("汽车变形");
    }
}
class AirPlaneControlChip implements ControlChip{
    //飞机芯片
    @Override
    public void move() {
        System.out.println("移动");
    }

    @Override
    public void transform() {
        System.out.println("飞机变形");
    }
}
public class RobotTest {
    public static void main(String[] args) {
        WalkControlChip w=new WalkControlChip();
        RunningControlChip r=new RunningControlChip();
        CarControlChip c=new CarControlChip();
        AirPlaneControlChip a=new AirPlaneControlChip();
        Robot r1=new Robot(w);
        r1.move();
        r1.transform();
        Robot r2=new Robot(c);
        r2.move();
        r2.transform();
    }
}

2.智能形状识别器

设计一种智能形状识别器,能够识别出具体形状并输出相关信息。如传入圆形对象,则识别器则输出圆形、半径与面积等信息;传入矩形对象,能输出矩形、面积、长宽信息。

程序中识别功能不能使用if语句进行形状判断。

要求:

    1、给出面向对象的设计(类图);

    2、给出Java代码实现。

import java.util.List;

interface Shape{
    double calculateArea();//形状接口,抽象出求面积方法
}
class Circle implements Shape{
    //圆类
    double radius;
    double area; //面积
    public Circle(double radius){
        this.radius=radius;
    }
    @Override
    public double calculateArea() {
        return Math.PI*radius*radius;
    }
    public double getRadius(){
        return this.radius;
    }

}
class Rect implements Shape{
    //矩形类
    double length;
    double width;
    public Rect(double length,double width){
        this.length=length;
        this.width=width;
    }
    @Override
    public double calculateArea(){
        return length*width;
    }
    public double getLength(){
        return length;
    }
    public double getWidth(){
        return width;
    }
}
class Recognize{
    //识别器类
    Shape shape; //形状
    public Recognize(Shape shape){
        this.shape=shape;
        double area=shape.calculateArea();
        if(shape instanceof Circle){
            //判断是圆
            Circle circle=(Circle) shape; //向下转换
            System.out.println("Shape: Circle");
            System.out.println("Circle Radius:"+circle.getRadius());
            System.out.println("Circl Areae:"+area);
        }else if(shape instanceof Rect){
            Rect rect=(Rect) shape;
            System.out.println("Shape: Rect");
            System.out.println("Rect Length:"+rect.getLength());
            System.out.println("Rect Width:"+rect.getWidth());
            System.out.println("Rect Area:"+area);
        }
    }

}
public class RecognizerTest {
    public static void main(String[] args) {
        Circle circle=new Circle(10);
        Rect rect=new Rect(6,8);
        Recognize recognize1=new Recognize(circle);
        Recognize recognize2=new Recognize(rect);

    }
}

3.狗嗅+狗咬人

狗有多种嗅的功能,嗅到骨头流口水,嗅到老虎吓得跑,嗅到主人很高兴。

人有生命值(假设100),所有的狗都会咬人,藏獒(或泰迪)攻击一次可减少50(或1)个生命值。我先后养了藏獒、泰迪,都取了相同的宠物名-小黄。

结构小黄都咬人了。

要求:

    1、给出面向对象的设计(类图);

    2、给出Java代码实现。

class Person{
    //人类
    int health=100;
    private Dog dog;
    public int getHealth(){
        return health;
    }

    public void setDog(Dog dog) {
        this.dog = dog;
    }
    public void setHealth(int health){
        this.health=health;
    }
}
class  Dog{
    String name;
    public void sniff(Object object){
        if(object instanceof Bone){
            System.out.println(name+"嗅到骨头流口水");
        }else if(object instanceof Tiger){
            System.out.println(name+"嗅到老虎吓得跑");
        }else if(object instanceof Person){
            System.out.println(name+"嗅到主人很高兴");
        }
    }
    public void bite(Person person){
        System.out.println(name+"咬人");
    }
}
class Bone{

}
class Tiger{

}
class Tibetan extends Dog{
    public Tibetan(String name){
        this.name=name;
    }
    @Override
    public void bite(Person person){
        person.setHealth(person.getHealth()-50);
        System.out.println(name+"咬人了");
    }
}
class Teddy extends Dog{
    public Teddy(String name){
        this.name=name;
    }
    @Override
    public void bite(Person person){
        person.setHealth(person.getHealth()-1);
        System.out.println(name+"咬人了");
    }
}
public class DogTest {
    public static void main(String[] args) {
        Person p=new Person();
        Tibetan t1=new Tibetan("小黄1");
        Teddy t2=new Teddy("小黄2");
        Bone b=new Bone();
        p.setDog(t1);
        t1.sniff(b);
        t1.bite(p);
        System.out.println(p.getHealth());
        p.setDog(t2);
        t2.sniff(b);
        t2.bite(p);
        System.out.println(p.getHealth());
    }
}

4.银行账户攻防

假定银行账户能够提供存款、取款和查询余额操作。

系统受到黑客攻击,设计出一种程序,将取款多少变成存款多少。请实现上述要求。

要求:

    1、给出面向对象的设计(类图);

    2、给出Java代码实现。

class BankAccount{
    private double balance;
    public  BankAccount(double balance){
        this.balance=balance; //原有多少钱
    }
    public void deposit(double money){
        this.balance=balance+money;
    }
    public void withdraw(double money){
        deposit(money);
    } //取款变成存款
    public double getBalance(){
        return balance;
    }
}
public class BankTest {
    public static void main(String[] args) {
        BankAccount bankAccount=new BankAccount(1400);
        System.out.println(bankAccount.getBalance());
        bankAccount.deposit(400);
        System.out.println(bankAccount.getBalance());
        bankAccount.withdraw(500);
        System.out.println(bankAccount.getBalance());
    }
}

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