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  • 第九周上机练习

    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 text9{
    
        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 text{
        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 personCreate{
        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;
        }
    }
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  • 原文地址:https://www.cnblogs.com/GEM520/p/12807523.html
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