第八次作业

一、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。

package zy;
import java.util.Arrays;
import java.util.Random;
import java.util.Scanner;
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(6, 1);
        System.out.println(p1.movePoint(4, 6));
        Point p2 = new Point(3, 6);
        System.out.println(p2.movePoint(4, 9));
}
}

 二、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 zy;

public class computer {
   char colour;
   int cpu;

   public void show() {
       System.out.println("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();
   }



   public static void main(String[] args) {
       computer s1 = new computer();
       s1.colour = '白';
       s1.cpu = 11;
       s1.show();
       computer s2 = new computer('红', 21);
       s2.show();
   }
}

 四、定义两个类，描述如下：[必做题]
1.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
2.定义一个PersonCreate类：
(1)创建两个对象，分别是zhangsan，33岁，1.73；lishi，44，1.74
(2)分别调用对象的sayHello()方法。

package zy;

 

public class Person {

 

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 zy;
public class PersonCreate {
public static void main(String[] args) {

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();

}
}