At depaul university has done some work on automated theorem provers to detect null - pointer exceptions in java code 已经在自动化定理方面做了一些工作，在java代码中侦测出空指针异常。
Because null - pointer exceptions are more difficult to diagnose , this " fix " would actually decrease the quality of the code 因为空指针异常更难诊断，这种“修正”实际上会降低代码的质量。
Option so that if there is any error in allocating memory , it does not throw an exception but rather returns a null pointer 选项，这样当分配内存出错时，就不会触发异常，而是返回一个空指针。
Pointer to a variable that receives the completion key value associated with the file handle whose i / o operation has completed 所以在使用这个函数的时候只需要将此处填一相应数据结构的空指针就可以了。
[ out ] pointer to a variable that receives the completion key value associated with the file handle whose i / o operation has completed 所以在使用这个函数的时候只需要将此处填一相应数据结构的空指针就可以了。
In my last article , i showed how the substitution of null pointers for various base types of data is one of the most common causes of 在我的上一篇文章中，我说明了用空指针代替各种不同基本类型的数据是如何成为引起
But you will often see methods that indicate such a condition by returning a null - pointer value and , perhaps , printing a message to 但是经常看到的方法是通过返回一个空指针值来表明这种情况（以及，可能打印一条消息到
In particular , we ll look into bug patterns that crop up as null pointer exceptions and discuss how to minimize their occurrence 我们将特别看一下作为空指针异常而出现的错误模式，并讨论如何将它们的出现次数控制到最少。
Common coding errors reported by the tool include buffer overrun , un - initialized memory , null pointer dereference , memory and resource leaks 工具报告的常见编码错误包括缓冲区溢出、内存未初始化、空指针取消引用以及内存和资源泄漏。
Which says nothing about what was expected to occur instead of the null pointer , a class - cast exception is relatively easy to debug （该异常除了报告空指针之外，对于将要发生的事情什么也不说）不同，类强制转换异常相对来说容易调试。
