第八周作业

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]

package com.wht.dome1;


public class Point {
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));
}
}

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

package JavaDemo;

public class Rectangle {
    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();
    }
    
}

 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。

package JavaDemo;

public class Computer {
     private char color;
     private int cpu;
    public Computer() {
        super();
        // TODO Auto-generated constructor stub
    }
    public Computer(char color, int cpu) {
        super();
        this.color = color;
        this.cpu = cpu;
    }
    public void showAll() {
        System.out.println("笔记本的颜色为"+color+"笔记本的型号为"+cpu);
    }
     
}
package JavaDemo;

public class Test {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
     Computer a=new Computer('黄',1002);
     a.showAll();
    }

}

 定义一个人类Person:
(1)定义一个方法sayHello(),可以向对方发出问候语“hello,mynameisXXX”
(2)有三个属性:名字、身高、体重
(3)通过构造方法,分别给三个属性赋值

package JavaDemo;


public class Person1 {

private String name;
private double height;
private int weight;

public Person1() {
super();
// TODO Auto-generated constructor stub
}

public void sayHello() {
System.out.println("hello my name is "+this.name);
}

public String getName() {
return name;
}



public void setName(String name) {
this.name = name;
}



public double getHeight() {
return height;
}



public void setHeight(double height) {
this.height = height;
}



public int getWeight() {
return weight;
}



public void setWeight(int weight) {
this.weight = weight;
}


 


}

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。

 

package JavaDemo;

public class Vehicle {

    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();
    
    }

}

 

 

 

 

posted @ 2023-06-10 15:46  只有子芊可以吗  阅读(8)  评论(0编辑  收藏  举报