public class TestBankAccount {
    public static void main(String[] args){
        BankAccount account = new BankAccount("abc123","zj");

        System.out.println("当前余额：" + account.getBalance());

        account.deposit(500);
        account.deposit(-100);

        account.withdraw(200);
        account.withdraw(400);
        account.withdraw(-50);

        account.setOwnerName("ZJ123");
        System.out.println("修改后户主：" + account.getOwnerName());

        System.out.println("当前余额：" + account.getBalance());
    }
}