Comp Sci Java Program Input from file, output to file(s)

[iamjon.smith]

even switching to the proper slash "\t" as follows:

scanner = new Scanner(new File("population.txt"));
        scanner.useDelimiter("\t");
        while (scanner.hasNextLine())
            { //Checks if there's any more lines         
                city = scanner.next(); // reads to first space in line, sets the variable
                state = scanner.next(); // reads to second space in line, sets the variable
                population = scanner.nextInt(); // reads to the next space in line, sets variable
                //...more code

I still get the error writing to file.

I am still missing something.

 

[Mark44]

I believe your problem has to do with the pattern you're using to separate the city, state, and population fields, and this pattern seems to have something to do with regular expressions. See Pattern class.

The useDelimiter() method you're using has an overload that takes a Pattern parameter, and it would seem that the two methods operate similarly.

Do you have a debugger to use? If so, see what city is set to in the line, city = scanner.next();
Same for state and population.

If you don't have a debugger or don't know how to use it, add some temporary lines of code to display the values of these three variables to the console.

What sort of write error do you get?