定义一个类，并且去调用该怎么写

定义一个交通类Transport,声明两个私有属性speed和load分别表示速度和载重量，声明读取属性和修改属性的方法，声明显示方法show 0用来打印读取的数据，在构造方法里初始化属性值。心(1)定义汽车类Vehicles继承交通类，增加两个属性wheels和weight分别表示车轮数和车重量，声明读取属性和修改属性的方法，定义构造方法初始化所有属性《调用父类的构造方法》，覆盖父类的显示方法show()打印所有属性值(调用父类的显示方法)。4(2)在main方法里分别创建汽车类对象，通过构造方法传值，再调用show方法。p

public class Transport {
    
    private int speed;
    private int load;

    public Transport(int speed, int load) {
        super();
        this.speed = speed;
        this.load = load;
    }
    
    public int getSpeed() {
        return speed;
    }
    public void setSpeed(int speed) {
        this.speed = speed;
    }
    public int getLoad() {
        return load;
    }
    public void setLoad(int load) {
        this.load = load;
    }
    
    public void show() {
        System.out.println("speed=" + speed + ", load=" + load);
    }
}

public class Vehicles extends Transport{

    private int wheels;
    private int weight;
    
    public Vehicles(int speed, int load, int wheels, int weight) {
        super(speed, load);
        this.wheels = wheels;
        this.weight = weight;
    }
    
    public int getWheels() {
        return wheels;
    }
    public void setWheels(int wheels) {
        this.wheels = wheels;
    }
    public int getWeight() {
        return weight;
    }
    public void setWeight(int weight) {
        this.weight = weight;
    }

    public void show() {
        super.show();
        System.out.println("wheels=" + wheels + ", weight=" + weight);
    }
}

public class Test {

    public static void main(String[] args) {
        
        Vehicles v = new Vehicles(1,2,3,4);
        v.show();
        
    }
}