第九周练习

1、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(int
x0,y0),以及一个movePoint(int dx,int dy)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]

class text1{

    public static void main(String[] args) {
        point p1=new point(1,2);
        point p2=new point(1,2);
        System.out.println("p1坐标为"+"("+p1.getX()+","+p1.getY()+")");
        System.out.println("p2坐标为"+"("+p2.getX()+","+p2.getY()+")");
        p1.movePoint(2,3);
        p2.movePoint(3,4);
        System.out.println("p1坐标为"+"("+p1.getX()+","+p1.getY()+")");
        System.out.println("p2坐标为"+"("+p2.getX()+","+p2.getY()+")");
    }
        }
public class point {
     private int x;
     private int y;

    public point() {
    }

    public point(int x, int y) {
        this.x = x;
        this.y = y;
    }
    public void movePoint(int x, int y){
        this.x=x;
        this.y=y;
    }
    public int getX() {
        return x;
    }

    public void setX(int x) {
        this.x = x;
    }

    public int getY() {
        return y;
    }

    public void setY(int y) {
        this.y = y;
    }
}

2、定义一个矩形类Rectangle:(知识点:对象的
创建和使用)[必做题]
• 2.1 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。
• 2.2 有2个属性:长length、宽width
• 2.3 通过构造方法Rectangle(int width, int length),
分别给两个属性赋值
• 2.4 创建一个Rectangle对象,并输出相关信息

import java.util.Scanner;

//测试类
class text2{
    public static void main(String[] args) {
        Rectangle r=new Rectangle();
        System.out.println("请输入矩形长度");
        Scanner sc=new Scanner(System.in);
        int length = sc.nextInt();
        r.setLength(length);
        System.out.println("请输入矩形宽度");
        int width = sc.nextInt();
        r.setWidth(width);
    r.getAll();
    r.getArea();
    r.getPer();

    }
}
//矩形类
    public class Rectangle {
    private int length;
    private int width;

    public Rectangle() {
    }

    public Rectangle(int length, int width) {
        this.length = length;
        this.width = width;
    }

    public int getLength(int i) {
        return length;
    }

    public int getWidth() {
        return width;
    }

    public void setLength(int length) {
        this.length = length;
    }

    public void setWidth(int width) {
        this.width = width;
    }
    //求面积
    public void getArea(){
        System.out.println("面积为;"+width*length);
    }
    //求周长
    public void getPer(){
        System.out.println("周长为;"+(width+length)*2);
}
    public void getAll(){
        System.out.println("长度为"+length+"宽度为"+width+"面积为"+width*length+"周长为"+(width+length)*2);
}
}

• 3、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]
• 3.1 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;
• 3.2 输出笔记本信息的方法
• 3.3 然后编写一个测试类,测试笔记本类的各个
方法。

class text3{

    public static void main(String[] args) {
        NoteBookComputer nbc=new NoteBookComputer('黑',1080);
        System.out.println("颜色;"+nbc.getColor()+"   "+"cpu:"+nbc.getCpu());
        NoteBookComputer nbc2=new NoteBookComputer();
        nbc2.setColor('红');
        nbc2.setCpu(1060);
        System.out.println("颜色;"+nbc2.getColor()+"   "+"cpu:"+nbc2.getCpu());
    }
}
public class NoteBookComputer {
    private char color;
    private int cpu;

    public NoteBookComputer() {
    }

    public NoteBookComputer(char color, int cpu) {
        this.color = color;
        this.cpu = cpu;
    }

    public char getColor() {
        return color;
    }

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

    public int getCpu() {
        return cpu;
    }

    public void setCpu(int cpu) {
        this.cpu = cpu;
    }
}

6、定义两个类,描述如下: [必做题]
• 6.1定义一个人类Person:
• 6.1.1定义一个方法sayHello(),可以向对方发出
问候语“hello,my name is XXX”
• 6.1.2有三个属性:名字、身高、年龄
• 6.1.3通过构造方法,分别给三个属性赋值
• 6.2定义一个Constructor类:
• 6.2.1创建两个对象,分别是zhangsan,33岁,
1.73;lishi,44,1.74
• 6.2.2分别调用对象的sayHello()方法。

class text4{
    public static void main(String[] args) {
        person p=new person("zhangsan",1.73,33);
        p.sayHello();
        person p2=new person("lisi",1.74,44);
        p2.sayHello();

    }
}
public class person {
    private String Name;
    private double Tall;
    private int Age;

    public void sayHello(){
        System.out.println("你好我们名字叫"+Name);
    }
    public person() {
    }

    public person(String name, double tall, int age) {
        Name = name;
        Tall = tall;
        Age = age;
    }

    public String getName() {
        return Name;
    }

    public void setName(String name) {
        Name = name;
    }

    public Double getTall() {
        return Tall;
    }

    public void setTall(Double tall) {
        Tall = tall;
    }

    public int getWeight() {
        return Age;
    }

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

 

posted @ 2020-04-30 11:33  青衫故人1118  阅读(181)  评论(0编辑  收藏  举报