import org.apache.commons.lang.math.IntUtils; import org.apache.commons.lang.math.NumberUtils; public class Main { public static void main(String[] args) { int[] numbers = {1, 2, 3, 4, 5}; int sum = IntUtils.sum(numbers); System.out.println("Sum: " + sum); String strNum = "10"; int parsedNum = NumberUtils.toInt(strNum); System.out.println("Parsed number: " + parsedNum); } }