public class BankAccountDemo {
    public static void main(String[] args) {
        System.out.println("====== 开始运行测试程序 ======\n");

        BankAccount myAccount = new BankAccount("CN-888", "王五");
        myAccount.deposit(5000.0);
        myAccount.deposit(2000.0);

        System.out.println("当前户主: " + myAccount.getOwnerName());
        System.out.println("当前余额: $" + myAccount.getBalance());

        myAccount.withdraw(1000.0);
        myAccount.withdraw(100000.0);
        myAccount.withdraw(-500.0);

        System.out.println("最终余额: $" + myAccount.getBalance());

        BankAccount friendAccount = new BankAccount("CN-999", "赵六");
        friendAccount.deposit(100.0);

        System.out.println("王五的余额: $" + myAccount.getBalance());
        System.out.println("赵六的余额: $" + friendAccount.getBalance());

        System.out.println("\n====== 测试程序结束 ======");
    }
}