Read Data From Text File And Sum Numbers

Question

I want to read in data from a text file which is full of integers and have the program print those integers out to the screen while summing them. This shouldn\'t be hard, b

Answer 1

It throws an exception because you don't increment i in the loop. In case if the number of integers in the input file is unknown, you can use the Scanner.hasNextInt() method to check the presence of the next integer (or just use hasNext() to check for EOF).

You can sum the numbers like in the code snippet below:

    ...
    int sum = 0;
    while(i++ < 25)
    {
        sum += aScanner.nextInt();
    }

or

    ...
    int sum = 0;
    while(aScanner.hasNextInt())
    {
        sum += aScanner.nextInt();
    }