设计一个银行账户类，该类具有以下属性和方法：账户号码、账户类型、余额、存款、取款。其中存款和取款方法会改变余额

好的，我可以为您设计一个银行账户类，如下所示：

public class BankAccount {
    private int accountNumber;
    private String accountType;
    private double balance;

    public BankAccount(int accountNumber, String accountType, double balance) {
        this.accountNumber = accountNumber;
        this.accountType = accountType;
        this.balance = balance;
    }

    public void deposit(double amount) {
        this.balance += amount;
    }

    public void withdraw(double amount) {
        if (amount > this.balance) {
            System.out.println("Not enough funds!");
        } else {
            this.balance -= amount;
        }
    }

    // Getters and setters
    public int getAccountNumber() {
        return accountNumber;
    }

    public void setAccountNumber(int accountNumber) {
        this.accountNumber = accountNumber;
    }

    public String getAccountType() {
        return accountType;
    }

    public void setAccountType(String accountType) {
        this.accountType = accountType;
    }

    public double getBalance() {
        return balance;
    }

    public void setBalance(double balance) {
        this.balance = balance;
    }
}

这个类有三个属性：账户号码、账户类型和余额。它还有两个方法：存款和取款。存款方法将给定的金额添加到余额中，而取款方法将从余额中减去给定的金额。在取款方法中，如果请求的金额大于余额，它会打印一个“Not enough funds!”的错误信息。

此外，这个类还有三个getter和setter方法，用于访问和修改属性。