具有数组对象的二进制文件有帮助 [英] Binary files with array objects help

问题描述

我知道我犯了一个错误，但我想知道是否有人可以告诉我我犯的错误类型。我知道我可以将整个数组写入文件，但我想为每个客户创建单独的二进制文件。然后我想读出二进制文件......其中一个或全部。


有人能帮助我吗？谢谢。

I know I''m making a mistake, but I''m wondering if someone could tell me the type of mistake I''m making. I know I can write the whole array to a file, but I want to create separate binary files for each Customer. Then I want to readout the binary file... either one or all of them.

Could someone help me? Thanks.

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推荐答案

数组''anotherArray''为null;分配阵列befire你取消引用它。


亲切的问候，


Jos

You array ''anotherArray'' is null; allocate the array befire you dereference it.

kind regards,

Jos

所以吧客户[] anotherArray =新客户[2]; ？


我也尝试重做代码......我觉得这样可行，但它不...任何想法？

So make it Customer[] anotherArray = new Customer[2]; ?

Also I tried to rework the code... I thought this would work, but it doesn''t... any idea?

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如果抛出了异常，请在catch子句中添加一个语句e.printStackTrace（），你就会确切地知道出了什么问题。


亲切的问候，


Jos


ps。你的代码没有编译;阅读编译器诊断消息。

If an Exception was thrown add a statement e.printStackTrace() to your catch clause and you''ll know exactly what went wrong.

kind regards,

Jos

ps. your code doesn''t compile; read the compiler diagnostic messages.

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