我试图将值传递给名为“account”的超类，然后将每个obj存储到数组列表中。

我的类帐户代码

abstract class account{
  String number;
  String  name;
  int amount;
  int newbalance;
  static final int balance = 1000;
  int bal;

  public  account(){
    // used to store the parameter passed into constructor

  }



  int deposit(int i) {
    return i;

  }

  void withdrawal(int i){

  }

  public void setData(String string, String string2, int i) {
    // TODO Auto-generated method stub

  }

  public void showData() {
    // TODO Auto-generated method stub

  }

}

在main方法中，我希望创建一个对象，然后传入要存储在数组列表中的name，number和amount值，因为我希望为它们存储具有不同名称number和amount的多个对象。 然后我想访问子类“sbaccount”并更新“newbalance”变量

我的主代码

public class oopassignment {

    public static void main(String[] args) {
        String type;
        Scanner input = new Scanner (System.in);
        System.out.println("What type of account do you want to create? :");
        type=input.nextLine();
        
         Account sb;
          sb = new sbaccount();
          
          //sb.setData("Jospeh", "0563994",50000);
          sb.setData("Joohn", "009734",50000);
          sb.setData("hope", "05634",50000);
          ArrayList <sbaccount> usera = new ArrayList<sbaccount>();
          usera.add((sbaccount) sb);
         usera.add((sbaccount) sb);
          for (int i = 0; i < usera.size(); i++){
        usera.get(i).showData();
           //userb.
          }
}

和子类“SBAccount”的代码

final class sbaccount extends Account {
  int total = 0;

  public  sbaccount(){
    super ();

  }
  public void setData(String  name, String  number, int  amount){

    this.name = name;
    this.number= number;
    this.amount= amount;
  }
  public void showData(){
    System.out.println("Account Owner: "+name);
    System.out.println("Account number: "+ number);
    System.out.println("Your New Amount is "+ newbalance);

    System.out.println("Your Account Balance is: $"+ total);
    return;
  }
  int deposit ( int money){
    newbalance = money + amount;

    System.out.println("Hi "+ name
        +" \nAccountnumber: "+ number
        +" \nYou have deposited :$"+money);
    System.out.println("\nYour Account balance is now :"+ newbalance);
    return newbalance;

  }
  void withdrawal(int withdraw){
    int total = 0;
    total = bal - withdraw;
    if (total <= balance){
      System.out.println("Your balance is too low for withdrawal!");

    }
    else{
      System.out.println("\nHi "+ name
          +" \nAccountnumber: "+ number
          +" \nYou have Withdrawn :$"+withdraw);
      System.out.println("\nYour Account balance is now :"+ total);
    }

  }

}