import java.util.*;

public class TypeSafe {

  public static void main(String[] args) {
    
    List<String> numbers = new ArrayList<String>();
    numbers.add("1");
    numbers.add(2);
    numbers.add("3");

    int total = 0;
    for(String number: numbers) {
      total += Integer.parseInt(number);
    }
    System.out.println("total = " + total);
  }
}