classCastException问题java 21，spring boot v3.2

Question

我隔离的一段代码有问题。它返回给我一个 classCastException。 如果我评论这个块一切正常。 请问你能帮帮我吗？ 谢谢

bankAccountService.listCustomers().forEach(customer -> {
        try {
            bankAccountService.saveCurrentBankAccount (Math.round(Math.random()*9000), 9000,customer.getId());
            bankAccountService.saveSavingBankAccount (Math.round(Math.random()*100000), 3.6,customer.getId());
            List<BankAccountDTO> bankAccounts= bankAccountService.bankAccountList();
           for (BankAccountDTO bankAccount: bankAccounts){
                for (int i = 0; i<10; i++){
                    try {
                        String accountId;
                        if(bankAccount instanceof SavingBankAccountDTO){
                        accountId=((SavingBankAccountDTO)bankAccount).getId();
                        }
                        else{
                            accountId=((CurrentBankAccountDTO)bankAccount).getId();
                        }
                        bankAccountService.credit(accountId,Math.round(1000+Math.random()*10000),"credit");
                        bankAccountService.debit(accountId,Math.round(Math.random()*1500),"debit" );
                    } catch (BankAccountNotFoundException | BalanceNotSufficentException e) {
                        throw new RuntimeException(e.getMessage());
                    }
                }
            };
        } catch (CustomerNotFoundException e) {
            throw new RuntimeException(e.getMessage().toUpperCase());
        }
    });
[![enter image description here](https://i.stack.imgur.com/AXx88.png)](https://i.stack.imgur.com/AXx88.png)

自从我施放了这个方块后，我遇到了一个问题

 String accountId;
                        if(bankAccount instanceof SavingBankAccountDTO){
                        accountId=((SavingBankAccountDTO)bankAccount).getId();
                        }
                        else{
                            accountId=((CurrentBankAccountDTO)bankAccount).getId();

Answer 1

往来账户：

 hi,`   package es.riba.ebankingbackend.entities;

import jakarta.persistence.DiscriminatorValue;
import jakarta.persistence.Entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
@AllArgsConstructor
@Entity
@DiscriminatorValue("CURR")
public class CurrentAccount extends BankAccount {
    private double overDraft;

}   `