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14周

作者:互联网

2、设计2个类,要求如下:(知识点:类的继承 方法的覆

盖) [必做题]

(String类型)和速度speed(duble类型)。

初始化为任意值,但速度的初始值必须为0)。

之后不能修改。

功能

的汽车。

,载人数为2人的轿车。

package week14;
        

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

    
    public Vehicle(String brand, String colour, double speed) {
        super();
        this.brand = brand;
        this.colour = colour;
        this.speed = 0;
    }



    public String getBrand() {
        return brand;
    }



    
    public String getColour() {
        return colour;
    }



    public void setColour(String colour) {
        this.colour = colour;
    }



    public double getSpeed() {
        return speed;
    }



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



    public Vehicle() {
        super();
    }
    
    public void run(){
        System.out.println(brand+"品牌"+colour+"色的车正以"+"速度"+speed+"在行驶");
    }

    
    public static void main(String[] args) {
        
        // TODO Auto-generated method stub
        Vehicle v=new Vehicle("benz","black",100);
        v.setSpeed(120);
        v.run();

    }

}
package week14;

public class Car extends Vehicle{
    int loader;
    


    public int getLoader() {
        return loader;
    }



    public void setLoader(int loader) {
        this.loader = loader;
    }



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



    

    public Car() {
        super();
        // TODO Auto-generated constructor stub
    }



    public Car(String brand, String colour, double speed) {
        super(brand, colour, speed);
        // TODO Auto-generated constructor stub
    }
    
    
    public void run(){
        System.out.println(brand+"品牌"+colour+"色的车正以"+"速度"+speed+"在行驶"+"该车载人数为"+loader+"人");
    }


    
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Car c=new Car("honda","red",100,2);
        c.setSpeed(100);
        c.setLoader(2);
        c.run();
        

    }

}

 

 

 

 

) [必做题]

颜色属性clr,有两个构造方法(一个是默认的、一个是

为颜色赋值的),还有3个抽象方法,分别是:getArea计算

面积、getPer计算周长、shwAll输出所有信息,还有一个求

颜色的方法getClr。

、height表示宽度,重写getPer、getArea和shwAll三个方法

,另外又增加一个构造方法(一个是默认的、一个是为高度

、宽度、颜色赋值的)。

getPer、getArea和shwAll三个方法,另外又增加两个构造

方法(为半径、颜色赋值的)。

子类的shwAll方法。

package week14;

public abstract class Shape {
    double area;
    double per;
    String colour;
    


    public Shape(int area, int per, String colour) {
        super();
        
        this.colour = colour;
    }


    public Shape() {
        super();
        // TODO Auto-generated constructor stub
    }
    
     public abstract double getPer();
     public abstract double getArea();
     public  abstract void showAll();
    

    public String getColour() {
        return colour;
    }


    
}
package week14;

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

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

       double width;
       double height;

       

       public double getWidth() {
        return width;
    }

    public void setWidth(double width) {
        this.width = width;
    }

    public double getHeight() {
        return height;
    }

    public void setHeight(double height) {
        this.height = height;
    }

    public Rectangle(int area, int per, String colour, double width,
            double height) {
        super(area, per, colour);
        this.width = width;
        this.height = height;
        this.colour = colour;
    }

    public Rectangle() {
           super();
       }
       public void showAll() {
           System.out.println("长为" + width + ",宽为" + height + ",颜色为" + colour + ",周长为" + getPer() + ",面积为" + getArea());
       }
      


}
package week14;

public class Circle extends Shape {
    double radius;
    public Circle(){
         
    }
 
    public Circle(double radius,String color) {
        super();
        this.colour=colour;
        this.radius = radius;
    }
    public double getArea(){
        return 3.14*radius*radius;
    }
    public double getPer(){
        return 2*3.14*radius;
    }
    public void showAll(){
        System.out.println("圆形的半径是"+radius+",颜色是"+colour+",周长是"+getPer()+",面积是"+getArea());
    }
     
 
}
package week14;

public class Test {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Rectangle r=new Rectangle();
        r.setHeight(2);
        r.setWidth(3);
        r.showAll();
        Circle v=new Circle(2,"粉");
        v.showAll();
    }

}

 

标签:String,double,colour,void,speed,public,14
来源: https://www.cnblogs.com/Astra1208/p/14890622.html