nullpointerexception

As you can see , running this new test case yields a nasty NullPointerException .

正如您可以看到的，运行这个新测试用例会产生一个令人讨厌的NullPointerException。

In Java , calling any method on null will cause a NullPointerException .

然而在Java中，企图调用一个null对象的方法将会引发一个NullPointerException异常。

Note : If you leave the properties variable value as null , you get NullPointerException .

注意：如果您保留properties变量值null，您得到NullPointerException。

This option produces a system dump when a NullPointerException is caught by the catch () method

当catch（）方法捕捉到一个NullPointerException异常时，这个选项会产生一个系统转储文件

The error displayed is a NullPointerException occurring in the toString () method on the Appointment class .

显示的错误是一个NullPointerException，它发生在Appointment类上的toString（）方法中。

If you don 't , you 'll surely end up seeing the nefarious NullPointerException .

如果您不检查，最终一定会看到这个可恶的NullPointerException。

But you receive a NullPointerException , because the current row no longer exists & it was modified , and the changes aren 't visible in the current cursor .

但是将会收到NullPointerException，因为当前行已不存在&它已被修改，并且更改在当前的游标中不可见。