Parameters and local variables are allocated on the stack (with reference types, the object lives on the heap and a variable in the stack references that object on the heap). The stack typically lives at the upper end of your address space and as it is used up it heads towards the bottom of the … Read more
You should always use the following syntax to rethrow an exception. Else you’ll stomp the stack trace: throw; If you print the trace resulting from throw ex, you’ll see that it ends on that statement and not at the real source of the exception. Basically, it should be deemed a criminal offense to use throw … Read more
Yes, there is a difference. throw ex resets the stack trace (so your errors would appear to originate from HandleException) throw doesn’t – the original offender would be preserved. static void Main(string[] args) { try { Method2(); } catch (Exception ex) { Console.Write(ex.StackTrace.ToString()); Console.ReadKey(); } } private static void Method2() { try { Method1(); } … Read more
except Exception: pass Python docs for the pass statement
Assuming you do not have permissions set from your LogCat error description, here is my contents for my AndroidManifest.xml file that has access to the internet: <manifest xlmns:android…> … <uses-permission android:name=”android.permission.INTERNET” /> <application … </manifest> Other than that, you should be fine to download a file from the internet.
“I do not know if it is out of ignorance, but I do not like that kind of programming, as it is using exceptions to perform flow control.” In the Python world, using exceptions for flow control is common and normal. Even the Python core developers use exceptions for flow-control and that style is heavily … Read more
If you are always expecting to find a value then throw the exception if it is missing. The exception would mean that there was a problem. If the value can be missing or present and both are valid for the application logic then return a null. More important: What do you do other places in … Read more
It depends how exceptions are implemented. The simplest way is using setjmp and longjmp. That means all registers of the CPU are written to the stack (which already takes some time) and possibly some other data needs to be created… all this already happens in the try statement. The throw statement needs to unwind the … Read more
The parentheses are poorly placed. You need to use: doThrow(new Exception()).when(mockedObject).methodReturningVoid(…); ^ and NOT use: doThrow(new Exception()).when(mockedObject.methodReturningVoid(…)); ^ This is explained in the documentation
You should be using IllegalArgumentException (IAE), not NullPointerException (NPE) for the following reasons: First, the NPE JavaDoc explicitly lists the cases where NPE is appropriate. Notice that all of them are thrown by the runtime when null is used inappropriately. In contrast, the IAE JavaDoc couldn’t be more clear: “Thrown to indicate that a method … Read more