第十一周java作业

class fff{
    public static void main(String[] args) {
        Vehicle v=new Vehicle("benz","black",0);
        String s = v.toString();
        System.out.println(s);
        v.run();
    }


}
public class Vehicle {
  private  String brand;
   private String color="红";
    private double spend=0;

    public Vehicle(String brand,String color,double spend) {
        this.brand = brand;
        this.color=color;
        this.spend=spend;
    }
    public Vehicle(){}

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public double getSpend() {
        return spend;
    }

    public void setSpend(double spend) {
        this.spend = spend;
    }

    public String getBrand() {
        return brand;
    }
    public void run(){
        System.out.println("车在跑");
    }

    @Override
    public String toString() {
        return "Vehicle{" +
                "brand='" + brand + '\'' +
                ", color='" + color + '\'' +
                ", spend=" + spend +
                '}';
    }
}
//子类
class text2{
    public static void main(String[] args) {
        Car c=new Car("Honda","red",0,2);
        c.run();
    }

}
public class Car extends Vehicle {
    int loader;

    public Car(String brand, String color, double spend, int loader) {
        super(brand, color, spend);
        this.loader = loader;
    }

    public int getLoader() {
        return loader;
    }

    public void setLoader(int loader) {
        this.loader = loader;
    }
    public void run(){
        System.out.println("功能升级");
    }
}

public class PolyDemo {
    public static void main(String[] args) {
        Rectangle r=new Rectangle("蓝",6,6);
        Circle c=new Circle("蓝",7);
        r.getAll();
        c.getAll();
    }
}
//父类（形状类）
public abstract class Shape {
    double area;
    double per;
    String color;

    public Shape() {
    }

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

    public Shape(int area, int per, String color) {
        this.area = area;
        this.per = per;
        this.color = color;
    }
    public abstract double getArea();
    public abstract double getPer();
    public abstract void getAll();

    public String getColor() {
        return color;
    }
}
//子类（矩形类）
public class Rectangle extends Shape{
    int width;
    int height;

    public Rectangle(String color, int width, int height) {
        super(color);
        this.width = width;
        this.height = height;
    }

    @Override
    public double getArea() {
         area=width*height;
        return area;
    }

    @Override
    public double getPer() {
        per=(width+height)*2;
        return per;
    }

    @Override
    public void getAll() {
        System.out.println("宽为"+width+"高为"+height+"面积为"+getArea()+"周长为"+getPer());

    }
}

子类（圆形类）
public class Circle extends Shape {
    int radius;

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

    @Override
    public double getArea() {
    area=3.14*(radius*radius);
        return area;
    }

    @Override
    public double getPer() {
    per=2*3.14*radius;
        return per;
    }

    @Override
    public void getAll() {
        System.out.println("半径为"+radius+"面积为"+getArea()+"周长为"+getPer());
    }
}