16n.txt

一本关于JBuilder 应用开发的书籍,希望大家喜欢,其实我没看过的,

  public float getBalance()
  {
    return _balance;
  }
  public void debit(float amount)
  {
    if(amount > _balance)
    {
      //余额不足的处理
      _context.setRollbackOnly();
    }
    else
    {
      _balance = _balance - amount;
    }
  }
  public void credit(float amount)
  {
    _balance = _balance + amount;
  }