建一个用户账户类UserAccount

建一个用户账户类UserAccount ，属性和方法为：
属性：身份证号码（userId）、姓名（userName）、联系电话（userTel）、银行卡号（bankCardId）、当前余额（currentBalance）、交易时间（dealTime）、交易金额（dealAmount）

方法：（1）查询余额：查询用户当前余额，返回值为float类型

             float checkBalance()

     （2）存/取款：输入钱数、存取款标志，进行存取款操作，flag为true表示存钱，如果为false表示取钱，返回余额。

   float business(float amount, boolean flag)

要求：

（1）对属性使用getter和setter方法进行封装

（2）创建UserAccountExample类，保护main()主函数，创建对象，为属性赋值，测试查询余额和存取款功能

public class UserAccount {
    private String userId;
    private String userName;
    private String userTel;
    private String bankCardId;
    private float currentBalance;
    private String dealTime;
    private float dealAmount;

    public UserAccount(String userId, String userName, String userTel, String bankCardId, float currentBalance, String dealTime, float dealAmount) {
        this.userId = userId;
        this.userName = userName;
        this.userTel = userTel;
        this.bankCardId = bankCardId;
        this.currentBalance = currentBalance;
        this.dealTime = dealTime;
        this.dealAmount = dealAmount;
    }

    public float checkBalance() {
        return currentBalance;
    }

    public float business(float amount, boolean flag) {
        if (flag) {
            currentBalance += amount;
        } else {
            currentBalance -= amount;
        }
        return currentBalance;
    }
}

public class UserAccount {
    private String userId;
    private String userName;
    private String userTel;
    private String bankCardId;
    private float currentBalance;
    private String dealTime;
    private float dealAmount;
    
    public UserAccount(String userId, String userName, String userTel, String bankCardId, float currentBalance) {
        this.userId = userId;
        this.userName = userName;
        this.userTel = userTel;
        this.bankCardId = bankCardId;
        this.currentBalance = currentBalance;
    }
    
    public String getUserId() {
        return userId;
    }
    
    public void setUserId(String userId) {
        this.userId = userId;
    }
    
    public String getUserName() {
        return userName;
    }
    
    public void setUserName(String userName) {
        this.userName = userName;
    }
    
    public String getUserTel() {
        return userTel;
    }
    
    public void setUserTel(String userTel) {
        this.userTel = userTel;
    }
    
    public String getBankCardId() {
        return bankCardId;
    }
    
    public void setBankCardId(String bankCardId) {
        this.bankCardId = bankCardId;
    }
    
    public float getCurrentBalance() {
        return currentBalance;
    }
    
    public void setCurrentBalance(float currentBalance) {
        this.currentalance = currentBalance;
    }
    
    public String getDealTime() {
        return dealTime;
    }
    
    public void setDealTime(String dealTime) {
        this.dealTime = dealTime;
    }
    
    public float getDealAmount() {
        return dealAmount;
    }
    
    public void setDealAmount(float dealAmount) {
        this.dealAmount = dealAmount;
    }
    
    public float checkBalance() {
        return currentBalance;
    }
    
    public float business(float amount, boolean flag) {
        if (flag) {
            // 存款
            currentBalance += amount;
            dealAmount = amount;
            dealTime = new Date().toString();
        } else {
            // 取款
            if (amount > currentBalance) {
                System.out.println("余额不足！");
            } else {
                currentBalance -= amount;
                dealAmount = -amount;
                dealTime = new Date().toString();
            }
        }
        return currentBalance;
    }
}