已采纳回答 / 慕粉1464004687
需要复习Goddess的toString()方法。默认是Object类的toString()实现。//Object类中实现如下：public String toString() { return getClass().getName() + "@" + Integer.toHexString(hashCode()); }<...code...>
2016-06-26
最赞回答 / qq_与赠_03193390
因为你的create_user是string类型所以不赋值也可以默认为null，你的其他属性没赋值就报错是因为你没有给int类型的参数赋值，因为int类型没有默认值你必须得给他赋值，如果没有就会显示空指针异常，希望对你有所帮助。
2016-06-21
最新回答 / 信息变革时代
Your variable 'i' goes from 0 to 189, and is fed to the method that
reads the cells from the spreadsheet. Does the spreadsheet have that
many rows? Be aware that the fact that rows appear in the spreadsheet
program does not necessarily mean that the ...
2016-06-13