14

package Qc;

 

public class Vehicle {

    protected String brand;

    protected String color;

    protected double speed;

 

    public Vehicle(String brand, String color, double speed) {

        super();

        this.brand = brand;

        this.color = color;

        this.speed = 0;

    }

 

    public Vehicle() {

        super();

    }

 

    public String getBrand() {

        return 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 + "品牌" + color + "颜色的汽车" + "正在以" + speed

                + "的速度奔跑");

    }

}

package Qc;

 

public class T1 {

 

    /**

     * @param args

     */

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        Vehicle v1 = new Vehicle("benz", "black", 200);

        v1.run();

 

    }

 

}

 

 package Qc;

 

public class Car extends Vehicle {

    int lader;

 

    public Car(String brand, String color, double speed, int lader) {

        super(brand, color, speed);

        this.lader = lader;

    }

 

    public Car(String brand, String color, double speed) {

        super(brand, color, speed);

    }

 

    public int getLader() {

        return lader;

    }

 

    public void setLader(int lader) {

        this.lader = lader;

    }

 

    public void run() {

        System.out.println(brand + "品牌" + color + "颜色" + "载人数为" + lader + "的轿车"

                + "正在以" + speed + "的速度奔跑");

    }

}

package Qc;

 

public class T2 {

 

    public static void main(String[] args) {

        Car c = new Car("Honda", "red", 200, 2);

        c.run();

    }

}

 

3.

package www;

public abstract class Shape {
    double area;
    double per;
    char color;
    public Shape() {
        super();
    }
    public Shape(char color) {
        super();
        this.color = color;
    }
    public abstract double getPer();
    public abstract double getArea();
    public  abstract void showAll();
    public char getColor() {
        return color;
    }
    
}package www;

public class Rectangle extends Shape {
    @Override
    public double getPer() {
        // TODO Auto-generated method stub
        return (width + height) * 2;
    }

    @Override
    public double getArea() {
        // TODO Auto-generated method stub
        return width * height;
    }

    double width;
    double height;

    public Rectangle(double width, double height, char color) {
        super();
        this.width = width;
        this.height = height;
        this.color = color;
    }

    public Rectangle() {
        super();
    }
    public void showAll() {
        System.out.println("矩形的长是" + width + ",宽是" + height + ",颜色是" + color + ",周长是" + getPer() + ",面积是" + getArea());
    }
}
package www;
public class Circle extends Shape{
    double radius;

    public void showAll(){
        System.out.println("圆形的半径是"+radius+",颜色是"+color+",周长是"+getPer()+",面积是"+getArea());
    }
    @Override
    public double getPer() {
        // TODO Auto-generated method stub
        return 2*3.14*radius;
    }
    @Override
    public double getArea() {
        // TODO Auto-generated method stub
        return 3.14*radius*radius;
    }
    public Circle(double radius,char color) {
        super();
        this.radius = radius;
        this.color=color;
    }
    
}package www;

public class testshape {

    public static void main(String[] args) {
        // TODO 自动生成的方法存根

        Rectangle r = new Rectangle(2, 3, '黑');
        r.showAll();
        Circle c = new Circle(4, '红');
        c.showAll();

    }

}