Java第十次作业

1.

package work;

import work.Point;

public class test {
    public static void main(String[] args) {
        Point x1 = new Point(3.0, 5.5);
        Point x2 = new Point();
        x1.movePoint();
        x2.movePoint();
    }

}

class Point {
    double a;
    double b;

    public Point() {
        super();
    }

    public Point(double a, double b) {
        this.a = a;
        this.b = b;
    }

    public void movePoint() {
        System.out.println("点的坐标为");
        System.out.println(+a + "," + b);
    }
}

2.

package work;

import work.Rectangle;

public class test1 {
    public static void main(String[] args) {
        Rectangle a = new Rectangle(3, 4);
        a.getArea();
        a.getPer();
        a.showAll();
    }

}

 class Rectangle {
    int l;
    int w;

    public Rectangle(int dw, int dl) {
        super();
        w = dw;
        l = dl;
    }

    public void getArea() {
        int Area = w * l;
        System.out.println("面积是" + Area);
    }

    public void getPer() {
        int Per = (w + l) * 2;
        System.out.println("周长是" + Per);
    }

    public void showAll() {
        int Area = w * l;
        int Per = (w + l) * 2;
        System.out.println("长是" + l + "宽是" + w + "面积是" + Area + "周长是" + Per);
    }
}

3.

package work;

import work.notebook;

public class test3 {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        notebook a = new notebook('红', 9888);
        a.zhan();
    }
}

class notebook {
    char colour;
    int cpu;

    public notebook(char colour, int cpu) {
        this.colour = colour;
        this.cpu = cpu;
    }

    public notebook() {
        super();
    }

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