第八次作业

定义一个点类Point,包含2个成员变量x、y分别表示x和y坐标,2个构造器Point()和Point(intx0,y0),以及一个movePoint(intdx,intdy)方法实现点的位置移动,创建两个Point对象p1、p2,分别调用movePoint方法后,打印p1和p2的坐标。[必作题]
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package lll;

public class lll {
int x;

int y;

 

public Point(int x0, int y0) {

super();

this.x = x0;

this.y = y0;

}

 

public Point() {

super();

}

 

public String movePoint(int dx, int dy) {

x = dx + x;

y = dy + y;

return ("x为" + x + "y为" + y);

}

 

public static void main(String[] args) {

Point p1 = new Point(2, 5);

System.out.println(p1.movePoint(5, 5));

Point p2 = new Point(4, 7);

System.out.println(p2.movePoint(3, 7));
}
}
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 定义一个矩形类Rectangle:(知识点:对象的创建和使用)[必做题]
1.定义三个方法:getArea()求面积、getPer()求周长,showAll()分别在控制台输出长、宽、面积、周长。
2.有2个属性:长length、宽width
3.通过构造方法Rectangle(intwidth,intlength),分别给两个属性赋值
4.创建一个Rectangle对象,并输出相关信息

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package lll;

public class lll {
    private int length;
    private int width;
    
    public Rectangle() {
        
    }
    public Rectangle(int length,int width) {
        this.length=length;
        this.width=width;
    }
    public void getArea() {
        int a=length*width;
        System.out.println("面积为"+a);
    }
    public void getPer() {
        int b=2*length+2*width;
        System.out.println("周长为"+b);
    }
    public void showAll() {
        System.out.println("长为"+length+"宽为"+width);
        getArea();
        getPer();
    }
    public static void main(String[] args) {
        Rectangle c=new Rectangle(3, 4);
        c.getArea();
        c.getPer();
        c.showAll();
    }
    
}
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三、定义一个笔记本类,该类有颜色(char)和cpu型号(int)两个属性。[必做题]
1.无参和有参的两个构造方法;有参构造方法可以在创建对象的同时为每个属性赋值;
2.输出笔记本信息的方法
3.然后编写一个测试类,测试笔记本类的各个方法。

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package lll;

public classllll{

char colour;

    int cpu;
    public void show() {
        System.out.println("我的颜色是:" + colour+"色" + ",型号是:" + cpu);
    }
    public computer(char colour, int cpu) {
        super();
        this.colour = colour;

        this.cpu = cpu;
    }
    public computer() {
        super();
    }
}
package wen;

public class test {
public static void main(String[] args) {
// TODO Auto-generated method stub
 computer s1=new computer();
         s1.colour='黑';
         s1.cpu=121;
         s1.show();
         computer s2=new computer('蓝',111);
         s2.show();
}

}
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 5、定义两个类,描述如下: [必做题] • 5.1定义一个人类Person:

5.1.1定义一个方法sayHello(),可以向对方发出问 候语“hello,my name is XXX”

5.1.2有三个属性:名字、身高、体重 • 5.2定义一个PersonCreate类:

 5.2.1创建两个对象,分别是zhangsan,33岁,1.73 ;lishi,44,1.74

 5.2.2分别调用对象的sayHello()方法

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package lll;

public class lll {

String name;
    double height;
    int weight;
    int age;
    public void sayhello() {
       System.out.println("hello,my name is " + name);
        System.out.println("my height is " + height + "米");
        System.out.println("my weight is " + weight + "斤");
        System.out.println("my age is " + age + "岁");

}

}

package wen;

public class PersonCreate {

public static void main(String[] args) {

// TODO Auto-generated method stub

Person a = new Person();
        Person b = new Person();

        a.name ="zhangsan";

        a.age = 33;

        a.height = 1.73;

        a.weight = 120;

        b.name = "lishi";

        b.age = 44;

        b.height = 1.74;

        b.weight = 140;      

        a.sayhello();

        b.sayhello();

}

}
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定义一个汽车类Vehicle,要求如下:[选做题]
1.属性包括:汽车品牌brand(String类型)、颜色color(String类型)和速度speed(double类型),并且所有属性为私有。
2.至少提供一个有参的构造方法(要求品牌和颜色可以初始化为任意值,但速度的初始值必须为0)。
3.为私有属性提供访问器方法。注意:汽车品牌一旦初始化之后不能修改。
4.定义一个一般方法run(),用打印语句描述汽车奔跑
的功能
5.定义测试类VehicleTest,在其main方法中创建一个品牌为“benz”、颜色为“black”的汽车

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package lll;

public class lll {

    private final String brand;
    private String color;
    private double speed;

    public Vehicle(String brand, String color) {
        super();
        this.brand = brand;
        this.color = color;
    }
 
    public void run() {
        System.out.println("本汽车正在以"+this.speed+"迈的速度行驶");
    }
    )
    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public double getSpeed() {
        return speed;
    }

    public void setSpeed(double speed) {
        this.speed = speed;
    }

    public String getBrand() {
        return brand;
    }
}
package JavaDemo;

public class VeichleTest {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Vehicle v1=new Vehicle("benz","black");
        v1.setSpeed(60);
        v1.run();
    
    }

}
package JavaDemo;

public class VeichleTest {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Vehicle v1=new Vehicle("benz","black");
        v1.setSpeed(60);
        v1.run();
    
    }

}
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posted @ 2023-06-24 18:26  苏本琪  阅读(27)  评论(0)    收藏  举报