[java] Resetting the Scanner
Author
Is there anyway to reset the Scanner back to the start of the file besides closing it and opening it again?
Looking at the API docs, there doesn't appear to be one.
--But why would you want to? You should probably save whatever it is you need when the Scanner arrives at something you'll need later. Are you working with huge files or something?
--But why would you want to? You should probably save whatever it is you need when the Scanner arrives at something you'll need later. Are you working with huge files or something?
Author
Reading in a matrix of unknown size. First I use .nextLine() to get the number of rows, then .nextInt() for total items (divide that by rows to get columns), then create the array and read in the matrix. Its just kind of a pain to open and close the file so many times.
couldn't you do something like:
InputStream fileInputStream = new FileInputStream(myFile);Scanner aScanner = new Scanner(fileInputStream);// ... do your stufffileInputStream.reset();// ... read in matrix
Author
I'll give it a shot.
It works, but today the specs got changed so the size of the matrix is in the text file.
[Edited by - darkchrono4 on June 16, 2005 12:31:00 PM]
It works, but today the specs got changed so the size of the matrix is in the text file.
[Edited by - darkchrono4 on June 16, 2005 12:31:00 PM]
What Funkapotamus suggested is how I'd probably do it, actually I think it's the easier (and obviously faster) way to do what you want, rather than doing some kind of random access of a file on disk.
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