Java类的创建和继承以及方法怎么做

                                                                                                       自行车速度 （bprice） 自行车颜色（bcolour），自行车价格 （1）创建自行车（Bike）类，属性有：自行车类别（biketype）、 （bspeed）等，创建两个构造方法，分别
 为带参数的和无参的、创建各属性的getxXX和setXXX方法，再创建输出信息方法（voidshow0），用于输出自行车对象的各属性信息
   （2）创建山地车类（Mountainbike），直接维承Bike类，新增属性胎压（Tyrepressure），创建带参的构造方法，增加成员方法addspeed用于提高自行车速度，subspeed用于降低自行车速度·重写
  文类show方法，用于出山地车信息
  （3）创建测试类Test1，分别创建父类和子类对象进行测试，并输出各对象信息

public class Bike {
    private String biketype;
    private String bcolor;
    private int bprice;
    private int bspeed;
    public Bike(){}
    public Bike(String biketype, String bcolor, int bprice, int bspeed) {
        this.biketype = biketype;
        this.bcolor = bcolor;
        this.bprice = bprice;
        this.bspeed = bspeed;
    }

    public String getBiketype() {
        return biketype;
    }

    public void setBiketype(String biketype) {
        this.biketype = biketype;
    }

    public String getBcolor() {
        return bcolor;
    }

    public void setBcolor(String bcolor) {
        this.bcolor = bcolor;
    }

    public int getBprice() {
        return bprice;
    }

    public void setBprice(int bprice) {
        this.bprice = bprice;
    }

    public int getBspeed() {
        return bspeed;
    }

    public void setBspeed(int bspeed) {
        this.bspeed = bspeed;
    }

    
    public void show() {
        System.out.println("biketype='" + biketype + '\'' +
                ", bcolor='" + bcolor + '\'' +
                ", bprice=" + bprice +
                ", bspeed=" + bspeed );
    }
}

public class Mountainbike extends Bike{
    private int typePressure;

    public Mountainbike(int typePressure) {
        this.typePressure = typePressure;
    }

    public Mountainbike(String biketype, String bcolor, int bprice, int bspeed, int typePressure) {
        super(biketype, bcolor, bprice, bspeed);
        this.typePressure = typePressure;
    }
    
    public void addSpeed(int speed){
        this.setBspeed(this.getBspeed()+speed);
    }
    public void subSpeed(int speed){
        this.setBspeed(this.getBspeed()-speed);
    }

    @Override
    public void show() {
        super.show();
    }
}

Java继承_VickyMWW的博客-CSDN博客 练习一、选择1、在Java中，以下程序的输出结果是AA. Super–>printB. Test–>printC. Super–>printTest–>printD. 编译错误2、在Java中，以下关于方法重载和方法重写描述正确的是DA. 方法重载和方法重写实现的功能相同B. 方法重载出现在父子关系中，方法重写是在同一类中C. 方法重载的返回类型必须一致，参数项必须不同D. 方法重写需要出现在满足继承关系的子类中3、哪个选项中的方法插入到（1）处可以正确实 https://blog.csdn.net/VickyMWW/article/details/107624670

运行结果如下，如有帮助，请帮忙采纳一下，谢谢。

Bkie类：

public class Bike {
    protected String biketype;
    protected String bcolour;
    protected int bprice;
    protected int bspeed;
    public Bike(){}
    public Bike(String type,String color,int price,int speed){
        this.biketype = type;
        this.bcolour = color;
        this.bprice = price;
        this.bspeed = speed;
    }
    public void show(){
        System.out.println(this.toString());
    }
    public String getBiketype() {
        return biketype;
    }
    public void setBiketype(String biketype) {
        this.biketype = biketype;
    }
    public String getBcolour() {
        return bcolour;
    }
    public void setBcolour(String bcolour) {
        this.bcolour = bcolour;
    }
    public int getBprice() {
        return bprice;
    }
    public void setBprice(int bprice) {
        this.bprice = bprice;
    }
    public int getBspeed() {
        return bspeed;
    }
    public void setBspeed(int bspeed) {
        this.bspeed = bspeed;
    }
    @Override
    public String toString() {
        return "Bike [biketype=" + biketype + ", bcolour=" + bcolour + ", bprice=" + bprice + ", bspeed=" + bspeed
                + "]";
    }
    
}

Mountainbike类：

public class Mountainbike extends Bike{
    private int TyrePressure;
    public Mountainbike(String type,String color,int price,int speed,int pres){
        super(type,color,price,speed);
        this.TyrePressure = pres;
    }
    
    public void addSpeed(int s){
        this.bspeed += s;
    }
    public void subSpeed(int s){
        this.bspeed -= s;
    }
    
    public void show(){
        System.out.println(this.toString());
    }

    public int getTyrePressure() {
        return TyrePressure;
    }

    public void setTyrePressure(int tyrePressure) {
        TyrePressure = tyrePressure;
    }

    @Override
    public String toString() {
        return "Mountainbike [TyrePressure=" + TyrePressure + ", biketype=" + biketype + ", bcolour=" + bcolour
                + ", bprice=" + bprice + ", bspeed=" + bspeed + "]";
    }

}

Test1类：

public class Test1 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Bike bk = new Bike("普通自行车","黑色",400,15);
        Mountainbike mbk = new Mountainbike("凤凰山地车","红色",600,20,100);
        bk.show();
        mbk.show();
        mbk.addSpeed(3);
        mbk.show();
        mbk.subSpeed(5);
        mbk.show();
    }

}