Both approaches will catch all exceptions. There is no significant difference between your two code examples except that the first will generate a compiler warning because ex is declared but not used. But note that some exceptions are special and will be rethrown automatically. ThreadAbortException is a special exception that can be caught, but it will automatically be … Read more
The second parameter in Substring is the length of the substring, not the end index. You should probably include handling to check that it does indeed start with what you expect, end with what you expect, and is at least as long as you expect. And then if it doesn’t match, you can either do something else … Read more
The problem occurs when line is empty (e.g. “”). Then it doesn’t have a character at index 0, hence your error. To fix, you can check the length of line before you use charAt:
This answer is thanks to Matthias BUSSONNIER from the ipython-users mailing list. When I close the window of the running demo application, I see this error: An exception has occurred, use %tb to see the full traceback. SystemExit: 0 Just don’t use sys.exit(0) as you are not exiting python, but still running IPython. Add it … Read more
The problem is in source So, you’ve got to change it to a proper one So do that, edit the source of the fxml file here with this one
The error means that the string you’re trying to parse an integer from doesn’t actually contain a valid integer. It’s extremely unlikely that the text boxes will contain a valid integer immediately when the form is created – which is where you’re getting the integer values. It would make much more sense to update a and b in the … Read more
There are two issues in your code: Consider this: This simplified piece of code throws Cannot perform runtime binding on a null reference since speakers is not defined (null reference). You can fix it by defining speakers in the dynamic ViewBag before the loop: The second issue: speakers in your code is a List, you might want to define ViewBag.speakers as a List<List<string>> and call .Add(speakers) instead … Read more
This line means: Get the Screen object, get the text property and please crash if it doesn’t exist, then get the text converted to an integer, and please crash if it doesn’t exist. That’s what the ! means: “I am sure this thing exists, so please crash if it doesn’t”. And crash is what it did.
Got same error in this line Solved with non-zero based index How is it possible that the guys who created this library thought it was a good idea to use non-zero based indexing?
The problem is most likely that your application is using a relative pathname. As @BalusC says, relative pathnames can be problematic. But IMO, he goes way too far when he says “[y]ou should never use relative paths in java.io stuff”. When an application opens a file using (for example) the FileInputStream(File) constructor, relative pathnames are … Read more