ProjectEuler-Java/Sol13.java at master · JoshP/ProjectEuler-Java · GitHub

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import java.util.*;

import java.io.*;

import java.math.*;

public class Sol13 extends BaseSolution {

public void runSolution() {

try {

Scanner scanner = new Scanner(new FileInputStream("Sol13.txt"), "UTF-8");

BigInteger sum = BigInteger.ZERO;

while (scanner.hasNextLine()) {

// only the first 11 digits can affect the first 10 digits of the sum

sum = sum.add(new BigInteger(scanner.nextLine().substring(0, 11)));

}

System.out.println(sum.toString().substring(0, 10));

} catch (Exception ex) {

System.err.println(ex);

}