第十一次上机作业

1

.(1).

package llll;

public class test {

    public static void main(String[] args) {
        // TODO 自动生成的方法存根
        vehicle v=new vehicle();
        v.brand="benz";
        v.color="black";
        System.out.println(v.brand+" "+v.color);
        v.run();
    }
}

package llll;

public class vehicle {
    String brand,color;
    double speed;
    public void set(String color,double speed) {
        this.color=color;
        this.speed=0;
    }
    public String getBrand() {
        return brand;
    }
    public void run() {
        System.out.println("在高速上行驶");
    }
}

(2).

package qq;

public class text {

 public static void main(String[] args) {
    // TODO 自动生成的方法存根
 Car1 c=new Car1();
    c.brand="Honda";
    c.color="red";
    c.loader=2;
    System.out.println("品牌为"+c.brand+"颜色为"+c.color+"载入数为"+c.loader);
    c.run();
}
}

package qq;

public class car1 {

int loader;
public void getCar1() {
    this.loader=5;
}
public void run() {
    System.out.println("轿车在街上行驶");
} 
}

2.

package qq;

public class rectangle extends shape{

    double width;
    double height;

    public rectangle() {
    }

    public rectangle(double width, double height, String color) {
        super();
        this.width = width;
        this.height = height;
        this.color = color;
    }

    public void getArea() {
        area = width * height;
    }

    public void getPer() {
        per = (width + height) * 2;
    }

    public void showAll() {
        System.out.println("矩形面积为：" + area + "，周长为：" + per + ",颜色：" + color);
    }
}

package qq;
public class Circle extends shape {
    double radius;

    public Circle() {
    }

    public Circle(double radius, String color) {
        this.color = color;
        this.radius = radius;
    }

    public void getArea() {
        area = radius * radius * 3.14;
    }

    public void getPer() {
        per = 2 * radius * 3.14;
    }

    public void showAll() {
        System.out.println("圆的面积为：" + area + "，周长为：" + per + ",颜色：" + color);
    }
}

package qq;

public abstract class shape {
    protected double area;
    protected double per;
    protected String color;

    public shape() {
    }

    public shape(String color) {
        this.color = color;
    }

    public abstract void getArea();

    public abstract void getPer();

    public abstract void showAll();

}

package qq;

public class polydemo {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        shape a = new Circle(5, "红色");
        shape b = new rectangle(1, 4, "绿色");
        a.getArea();
        a.getPer();
        a.showAll();
        b.getArea();
        b.getPer();
        b.showAll();
    }

}