Java第十二周作业

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( intx0,y0),以及一个movePoint (int dx,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pl和p2的坐标。[必作题]

package Week12;

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(4,2);
         System.out.println(p1.movePoint(5, 5));
         Point p2=new Point(9,6);
         System.out.println(p2.movePoint(7, 8));
         
     }
}

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、getPer0求周长,showAll0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-个Rectangle对象, 并输出相关信息

package Week12;

public class Rectangle {

    /**
     * @param args
     */
       int length;
       int width;
       public int getArea(int length,int width){
           return length*width;
       }
       public int getPer(int length,int width) {
           return(length+width)*2;
       }
       public void showAll(){
           System.out.println("长方形的长是"+length+",宽是"+width+",周长是"+(length+width)*2+",面积是"+length*width);
        }
       
       public Rectangle(int length,int width){
           super();
           this.length=length;
           this.width=width;
    }
       
       public static void main(String[] args){
           //TODO Auto-generated method stub
           Rectangle r=new Rectangle(4,2);
           r.showAll();
       }

}

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 Week12;

public class Computer {
    char coulour;
    int cpu;
    
    public void show(){
        System.out.println("笔记本颜色是"+coulour+"色"+",型号是"+cpu);
    }
    
    public Computer(char coulour,int cpu){
        super();
        this.coulour=coulour;
        this.cpu=cpu;
    }
      public Computer(){
          super();
      }
}









package Week12;

public class Test {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Computer c=new Computer();
        c.coulour='粉';
        c.cpu=1;
        c.show();
        Computer c1=new Computer('白',2);
        c1.show();
        

    }

}

 

posted @ 2021-05-22 15:59  曲蔓特  阅读(51)  评论(0编辑  收藏  举报