在我的用户应用程序读取的/ proc /净/ xt_qtaguid /统计，造成显示java.lang.NullPointerException [英] read /proc/net/xt_qtaguid/stats in my user application and caused java.lang.nullpointerexception

问题描述

我搜索的问题。他们似乎可以读出与NullPointerException异常在/ proc /网/ xt_qtaguid /统计数据。

I search the questions. It seems that they can read the /proc/net/xt_qtaguid/stats with out nullpointerexception.

但是，当我读到这个文件它关闭虚拟机并报告显示java.lang.NullPointerException

But when I read this file it shut down the vm and report a java.lang.nullpointerexception

任何人都可以成功读取此文件？

can anyone succeed to read this file?

更新：Actualy，我可以通过

update: Actualy, I can read this file through

Runtime.getRuntime().exec("cat /proc/net/xt_qtaguid/stats")

或

BufferedReader in = new BufferedReader(new FileReader("/proc/net/xt_qtaguid/stats"));

该NullPointerException异常是投由于我不小心把未初始化的String []

The nullpointerexception is cast due to my careless to use an uninitialized String[]

推荐答案

如果你不是系统无法读取该文件。有这些文件保护，仅是通过系统UID入店的角度来看的原因。

You cannot read this file if you are not system. There is a reason these files are protected from the perspective of only being accesible by system uid.

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