第七次上机练习

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/*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]*/
package practice7.point;
 
public class Point {
 
    double x;
    double y;
     
    public Point() {
    }
 
    public void Point(double x0,double y0) {
        this.x = x0;
        this.y = y0;
        System.out.print("x的初始位置是" + this.x);
        System.out.println("      " + "y的初始位置是" + this.y);
    }
     
    public void movePoint(double dx,double dy){
        this.x += dx;
        this.y += dy;
        System.out.print("x移动了" + dx + "个单位长度");
        System.out.println("     " + "y移动了" + dy + "个单位长度");
        System.out.print("x移动后的位置为:" + this.x);
        System.out.println("   " + "y移动后的位置为:" + this.y);
    }
 
}

  

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package practice7.point;
 
import java.util.Scanner;
 
public class Test {
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
 
        Point p1 = new Point();
        p1.Point(11.1, 22.2);
        p1.movePoint(33.3,44.4);
         
        Point p2 = new Point();
        p2.Point(55.5, 66.6);
        p2.movePoint(77.7,88.8);
         
    }
 
}

  

 

 

 

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/*• 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*/
package practice7.Rectangle;
 
public class Rectangle {
 
    int length;
    int width;
   
    public  Rectangle(int width,int length){
        this.length = length;
        this.width = width;
    }
     
    public int getArea(){
        int area = length * width;
        return area;
    }
         
    public int getPer(){
        int per = (length + width)*2;
        return per;
    }
     
     void showAll(){
         System.out.println("length=" + length + " ");
         System.out.println("width=" + width + " ");
         System.out.println("area=" + getArea() + " ");
         System.out.println("per=" + getPer());
    }
     
}

  

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package practice7.Rectangle;
 
public class Test {
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
 
         Rectangle r = new Rectangle(12,55);
         r.showAll();
          
    }
 
}

  

 

 

 

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/*• 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。*/
package practice7.Computer;
 
public class Computer {
 
    char color;
    int cpu;
 
    public void computer() {
 
    }
 
    public void information(char color, int cpu) {
        this.color = color;
        this.cpu = cpu;
 
    }
 
    void showAll() {
        System.out.println("color:"+color);
        System.out.println("cup:"+cpu);
    }
}

  

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package practice7.Computer;
 
public class Test {
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
 
        Computer c=new Computer();
        c.information('粉',250);
        c.showAll();
    }
 
}

  

 

 

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/*• 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、体重
  • 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。*/
package practice7.Person;
 
public class Person {
 
    String name;
    int age;
    double height;
    public void sayHello(){
        System.out.println("hello,my name is " + name);
    }
    public void getValue(String name,int age,double height){
        this.name = name;
        this.age = age;
        this.height = height;
    }
}

  

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package practice7.Person;
 
public class Constructor {
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
 
         Person p1 = new Person();
         p1.getValue("zhangsan",33,1.73);
         p1.sayHello();
          
         Person p2 = new Person();
         p2.getValue("lishi",44,1.7);
         p2.sayHello();
          
    }
 
}

  

 

posted @   毒瘤大人  阅读(182)  评论(0编辑  收藏  举报
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