第十二周Java作业

1.1、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 wn01;

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,y)坐标为" +"("+x+","+ y+")");
    }

    public static void main(String[] args) {
        Point p1 = new Point(1, 2);
        System.out.println(p1.movePoint(3, 3));
        Point p2 = new Point(4, 5);
        System.out.println(p2.movePoint(6, 6));
    }
}

  

 

 

 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 wn02;

public class Rectangle {
            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("长方形的长为"+length+",宽为" +width+ ",周长为"+ (length + width) * 2 + ",面积为" + length * width);
            }
         
            public Rectangle(int length, int width) {
                super();
                this.length = length;
                this.width = width;
         
            }
         
            public static void main(String[] args) {
                Rectangle r = new Rectangle(1, 2);
                r.showAll();
         
            }
         
        }

  

 

 3.3、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 wn03;

public class not {
    char color;
    int cpu;

    public not() {
        super();
    }

    public not(char color, int cpu) {
        super();
        this.color = color;
        this.cpu = cpu;
    }

    public void show() {
        System.out.println("笔记本颜色是:" + color + "cpu型号是:" + cpu);
    }

}

  

package wn03;

public class not {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
            not b1 = new not('粉',2);
            not b2 = new not('蓝',3);
            b1.show();
            b2.show();
        }

    }

  

 

 


posted @ 2021-05-23 20:24  吴宁  阅读(56)  评论(0编辑  收藏  举报