[Solved] How to convert large numbers in a text file (strings) into ints and add them

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Maybe this code can help.

public static void main(String[] args) throws Exception {
    // write your code here
        Scanner scanner = new Scanner(new File("C:\\directory\\test.txt"));
        List<BigInteger> bigIntegers = new ArrayList<>();
        while (scanner.hasNext()) {
            bigIntegers.add(new BigInteger(scanner.next()));
        }
        BigInteger total = new BigInteger("0");
        for(BigInteger bigInt: bigIntegers) {
            total = total.add(bigInt);
        }
        System.out.println(total);
    }

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solved How to convert large numbers in a text file (strings) into ints and add them