java 编写一个账户类Account，它包括：一个名为id的int型账号码属性，一个名为balance的double型的账号余额属性，定义一个类型为java.util.Date的属性dateCreated，用于记录账号的创建日期。同时，定义无参的构造函数，一个名为withDraw的方法从账号提取特定数目的金额，此方法返回结果为布尔类型，提取成功为true且余额被减，不成功为false，一个名为deposit的方法向账号存入特定数目的金额。请编写测试程序，测试各个方法。

好的，你的问题是关于 Java 编写一个账户类 Account 的。以下是代码示例：

import java.util.Date;

public class Account {
    private int id;
    private double balance;
    private Date dateCreated;

    public Account() {
        id = 0;
        balance = 0.0;
        dateCreated = new Date();
    }

    public Account(int id, double balance) {
        this.id = id;
        this.balance = balance;
        dateCreated = new Date();
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public double getBalance() {
        return balance;
    }

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

    public Date getDateCreated() {
        return dateCreated;
    }

    public boolean withdraw(double amount) {
        if (amount <= balance) {
            balance -= amount;
            return true;
        } else {
            return false;
        }
    }

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

至于测试程序，我们可以这样写：

public class TestAccount {
    public static void main(String[] args) {
        Account a1 = new Account(1001, 5000.0);
        System.out.println("Account ID: " + a1.getId());
        System.out.println("Account Balance: $" + a1.getBalance());
        System.out.println("Account Date Created: " + a1.getDateCreated());

        double amount = 2000.0;
        boolean result = a1.withdraw(amount);
        if (result) {
            System.out.println("Withdraw successful. New balance: $" + a1.getBalance());
        } else {
            System.out.println("Withdraw failed. Insufficient balance.");
        }

        amount = 8000.0;
        a1.deposit(amount);
        System.out.println("Deposit successful. New balance: $" + a1.getBalance());
    }
}

这个测试程序会创建一个账户对象 a1，然后分别测试该账户对象的各个方法。输出结果类似于下面这样：

Account ID: 1001
Account Balance: $5000.0
Account Date Created: Thu Jan 31 13:27:34 CST 2019
Withdraw successful. New balance: $3000.0
Deposit successful. New balance: $11000.0

希望这样的回答对你有所帮助！