問：我有一個包含多個貸款帳戶的 Bank 類（LoanAccount 類）。我創建了一個具有 CRUD 功能的 LoanAccountService 。我擔心的是我如何實現更新功能。銀行public class Bank {    private List<LoanAccount> loanAccounts;}貸款賬戶public class LoanAccount {    private String id;    private Integer numberOfInstallments;    private LoanAccountType type;    private Date creationDate;    private BigDecimal loanAmount;}服務public class LoanAccountService{    private Bank bank;    public LoanAccountService(Bank bank) {        this.bank = bank;    }    public LoanAccount update(LoanAccount loanAccount) {        Optional<LoanAccount> account = bank.getLoanAccounts()                .stream()                .filter(la -> la.getId().equals(loanAccount.getId()))                .findAny();        if (account.isPresent()) {            account.get().setCreationDate(loanAccount.getCreationDate());            account.get().setLoanAmount(loanAccount.getLoanAmount());            account.get().setNumberOfInstallments(loanAccount.getNumberOfInstallments());            account.get().setType(loanAccount.getType());        } else {            throw new IllegalArgumentException("The object does not exist.");        }        return loanAccount;    }}當使用包含 LoanAccounts 列表中已存在的 ID 的 LoanAccount 調用方法更新時，我想使用作為參數給出的對象 LoanAccount 來更新現有對象。以上是我的實現，但我覺得應該有更好的方法來做到這一點。