Problem with arrays. StringTokenizers (null pointer)
Joined: Nov 15, 2007
Nevermind, I figured out a way around it - I will just put all the following data after the first line into the array, and store the first line (which is just an int value that says the number of lines after it) in a different public variable. Just did it, works like a charm!
I am trying to load a file and put its data into an array so that I can more easily use it; that's not really presenting a problem, as I can get that just fine. What I'm encountering is that when I try to extract a specific set of chars using a StringTokenizer from each element in that array I get some funky results.
This makes the array, but I can't use it how it is. I need to make it one element longer. Each time I do, though, I get a null pointer exception. (that's if I have ).
StringTokenizer is a legacy class that is retained for compatibility reasons although its use is discouraged in new code. It is recommended that anyone seeking this functionality use the split method of String or the java.util.regex package instead.
Joined: Oct 13, 2005
There is something odd; you seem to have a variable which records how many lines the file contains. That is a potential source of errors, if the counting is incorrect. You can use a while loop and != null.
Declare line inside the try block. Do your reading from the file with a while loop.
If you know how to use a List (ArrayList is probably the best kind of List for this purpose) simply add lines to the List.
Then you can get them back with the method in the Collections class which changes a Collection to an array, or use the List.