如何將使用多個信息類屬性的對象添加到主程序中的數組列表中？

Question

我有一個具有多個屬性的信息類 Vehicle ，我有一個擴展車輛類的輕便摩托車信息類。 我需要創建一個主程序，我可以將多個輕便摩托車添加到數組列表中，然后打印它們。 這是我的嘗試： info class1：

---

package data;

public class Vehicle {
private float price;
private String color;
private int maximumSpeed;

public float getPrice() {
    return price;
}
public void setPrice(float price) {
    this.price = price;
}
public String getColor() {
    return color;
}
public void setColor(String color) {
    this.color= color;
}
public int getMaximumSpeed() {
    return maximumSpeed;
}
public void setMaximumSpeed(int maximumSpeed) {
    this.maximumSpeed = maximumSpeed;
}

public String toString() {
    return "Price: "+this.price+" Color: "+this.color+" Maximum speed: "+this.maximumSpeed;
    
}

}

---

信息類2：

package data;

public class Moped extends Vehicle{
private String Brand;
private String type;

public String getBrand() {
    return brand;
}
public void setBrand(String brand) {
    this.brand= brand;
}
public String getType() {
    return type;
}
public void setType(String type) {
    this.type = type;
}


public String toString() {
return "Brand: "+this.brand+" Type: "+this.type;

}

}

主程序：

package app;

import java.util.ArrayList;
import java.util.Scanner;

import data.*;

public class ExtendsTest {

public static void main(String[] args) {
        
    ArrayList<Moped> list=new ArrayList<>();
    Moped mp=new Moped();
    askForMopedInfo(mp);
    lista.add(mp);
    
    printMoped(list);
}

private static void printMoped(ArrayList<Mopo> list) {
    for (int i=0;i<lista.size(); i++) {
        System.out.println(list.get(i));
        
    }
    
}

private static void askForMopedInfo(Moped mp) {

    Scanner scanner = new Scanner(System.in);
    
    System.out.print("Brand: ");
    String k = scanner.nextLine();
    mp.setBrad(k);
    
    System.out.print("Type: ");
    k = scanner.nextLine();
    mp.setType(k);
    
    System.out.print("Price: ");
    int k1 = Integer.parseInt(scanner.nextLine());
    mp.setPrice(k1);
    
    System.out.print("Color: ");
    k = scanner.nextLine();
    mp.setColor(k);
    
    System.out.print("Maximum speed: ");
    k1 = Integer.parseInt(scanner.nextLine());
    mp.setMaximumSpeed(k1);

}

}

當我運行程序時，我被要求：

Brand: 
Type: 
Price:
Color:
Maximum speed:

但程序只打印：

Brand: x Type: x

而且我仍然不確定如何將多個輕便摩托車添加到陣列列表中。 任何幫助將非常感激！

Answer 1

更新 Moped 類的 toString 方法，如下所示：

public String toString() {
    return super.toString() +" Brand: "+this.brand+" Type: "+this.type;
}