第十三周作业

1.

package School.Day12;

public class Vehicle {
    String brand;
    String color;
    double speed;

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

    public Vehicle() {
    }

    public String getBrand() {
        return brand;
    }

    public void setBrand(String brand) {
        this.brand = brand;
    }

    public String getColor() {
        return color;
    }

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

    public double getSpeed() {
        return speed;
    }

    public void setSpeed(double speed) {
        this.speed = speed;
    }

    public void run(){
        System.out.println(brand + "的" + color + "汽车正在行驶。速度: " + speed );
    }
}

　　

package School.Day12;

public class Car extends Vehicle{
    private int loader;

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

    public void run(){
        System.out.println(brand + "的" + color + "汽车正在行驶。速度: " + speed );
        System.out.println("可载人数: " + loader);
    }
}

　　

package School.Day12;

public class CarTest {
    public static void main(String[] args) {
        Car c = new Car("Honda","red",2);
        c.run();
    }
}

　　

2.

package School.Day12;

public  abstract class Shape {
    int area;
    int per;
    String color;

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

    public String getColor() {
        return color;
    }

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

    public Shape() {
    }
    public abstract int getArea();
    public abstract int getPer();
    public abstract void showAll();
}

　　

package School.Day12;

public class Rectangle extends Shape{
    int width;
    int height;

    public Rectangle() {
    }

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

    public int getArea() {
        return this.height * this.width;
    }


    public int getPer() {
        return 2 * (this.height + this.width);
    }

    public void showAll() {
        System.out.println("矩形颜色： " + getColor());
        System.out.println("矩形面积： " + getArea());
        System.out.println("矩形周长： " + getPer());
    }
}

　　

package School.Day12;

public class Circle extends Shape{
    int radius;

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

    public Circle(){

    }

    public int getArea() {
        return 3 * radius * radius;
    }

    public int getPer() {
        return 2 * 3 * radius;
    }

    public void showAll() {
        System.out.println("⚪的颜色: " + this.getColor());
        System.out.println("⚪的面积: " + this.getArea());
        System.out.println("⚪的周长: " + this.getPer());
    }

}

　　

package School.Day12;

public class ShapeTest {
    public static void main(String[] args) {
        Rectangle r = new Rectangle(10,20,"黑");
        r.showAll();
        Circle c = new Circle(10,"白");
        c.showAll();
    }
}